Fix hyperparameter saving

.dvc/.gitignore

@@ -0,0 +1,3 @@
+/config.local
+/tmp
+/cache

.dvcignore

@@ -0,0 +1,3 @@
+# Add patterns of files dvc should ignore, which could improve
+# the performance. Learn more at
+# https://dvc.org/doc/user-guide/dvcignore

.gitignore

@@ -114,3 +114,5 @@ experiments/*
 notebooks/lightning_logs
 example_data/preprocessed
 .aider*
+DvcLiveLogger/checkpoints
+logs

Makefile

@@ -1,94 +0,0 @@
-# Variables
-SOURCE_DIR = src
-TESTS_DIR = tests
-PYTHON_DIRS = src tests
-DOCS_SOURCE = docs/source
-DOCS_BUILD = docs/build
-HTML_COVERAGE_DIR = htmlcov
-
-# Default target (optional, often 'help' or 'all')
-.DEFAULT_GOAL := help
-
-# Phony targets (targets that don't produce a file with the same name)
-.PHONY: help test coverage coverage-html coverage-serve docs docs-serve format format-check lint lint-fix typecheck check clean clean-pyc clean-test clean-docs clean-build
-
-help:
-	@echo "Makefile Targets:"
-	@echo "  help             Show this help message."
-	@echo "  test             Run tests using pytest."
-	@echo "  coverage         Run tests and generate coverage data (.coverage, coverage.xml)."
-	@echo "  coverage-html    Generate an HTML coverage report in $(HTML_COVERAGE_DIR)/."
-	@echo "  coverage-serve   Serve the HTML coverage report locally."
-	@echo "  docs             Build documentation using Sphinx."
-	@echo "  docs-serve       Serve documentation with live reload using sphinx-autobuild."
-	@echo "  format           Format code using ruff."
-	@echo "  format-check     Check code formatting using ruff."
-	@echo "  lint             Lint code using ruff."
-	@echo "  lint-fix         Lint code using ruff and apply automatic fixes."
-	@echo "  typecheck        Type check code using pyright."
-	@echo "  check            Run all checks (format-check, lint, typecheck)."
-	@echo "  clean            Remove all build, test, documentation, and Python artifacts."
-	@echo "  clean-pyc        Remove Python bytecode and cache."
-	@echo "  clean-test       Remove test and coverage artifacts."
-	@echo "  clean-docs       Remove built documentation."
-	@echo "  clean-build      Remove package build artifacts."
-
-# Testing & Coverage
-test:
-	pytest tests
-
-coverage:
-	pytest --cov=batdetect2 --cov-report=term-missing --cov-report=xml tests
-
-coverage-html: coverage
-	@echo "Generating HTML coverage report..."
-	coverage html -d $(HTML_COVERAGE_DIR)
-	@echo "HTML coverage report generated in $(HTML_COVERAGE_DIR)/"
-
-coverage-serve: coverage-html
-	@echo "Serving report at http://localhost:8000/ ..."
-	python -m http.server --directory $(HTML_COVERAGE_DIR) 8000
-
-# Documentation
-docs:
-	sphinx-build -b html $(DOCS_SOURCE) $(DOCS_BUILD)
-
-docs-serve:
-	sphinx-autobuild $(DOCS_SOURCE) $(DOCS_BUILD) --watch $(SOURCE_DIR) --open-browser
-
-# Formatting & Linting
-format:
-	ruff format $(PYTHON_DIRS)
-
-format-check:
-	ruff format --check $(PYTHON_DIRS)
-
-lint:
-	ruff check $(PYTHON_DIRS)
-
-lint-fix:
-	ruff check --fix $(PYTHON_DIRS)
-
-# Type Checking
-typecheck:
-	pyright $(PYTHON_DIRS)
-
-# Combined Checks
-check: format-check lint typecheck test
-
-# Cleaning tasks
-clean-pyc:
-	find . -type f -name "*.py[co]" -delete
-	find . -type d -name "__pycache__" -exec rm -rf {} +
-
-clean-test:
-	rm -f .coverage coverage.xml
-	rm -rf .pytest_cache htmlcov/
-
-clean-docs:
-	rm -rf $(DOCS_BUILD)
-
-clean-build:
-	rm -rf build/ dist/ *.egg-info/
-
-clean: clean-build clean-pyc clean-test clean-docs

example_data/config.yaml

@@ -0,0 +1,146 @@
+targets:
+  classes:
+    classes:
+      - name: myomys
+        tags:
+          - value: Myotis mystacinus
+      - name: pippip
+        tags:
+          - value: Pipistrellus pipistrellus
+      - name: eptser
+        tags:
+          - value: Eptesicus serotinus
+      - name: rhifer
+        tags:
+          - value: Rhinolophus ferrumequinum
+    generic_class:
+      - key: class
+        value: Bat
+
+  filtering:
+    rules:
+      - match_type: all
+        tags:
+          - key: event
+            value: Echolocation
+      - match_type: exclude
+        tags:
+          - key: class
+            value: Unknown
+
+preprocess:
+  audio:
+    resample:
+      samplerate: 256000
+      method: "poly"
+    scale: false
+    center: true
+    duration: null
+
+  spectrogram:
+    stft:
+      window_duration: 0.002
+      window_overlap: 0.75
+      window_fn: hann
+    frequencies:
+      max_freq: 120000
+      min_freq: 10000
+    pcen:
+      time_constant: 0.4
+      gain: 0.98
+      bias: 2
+      power: 0.5
+    scale: "amplitude"
+    size:
+      height: 128
+      resize_factor: 0.5
+    spectral_mean_substraction: true
+    peak_normalize: false
+
+postprocess:
+  nms_kernel_size: 9
+  detection_threshold: 0.01
+  min_freq: 10000
+  max_freq: 120000
+  top_k_per_sec: 200
+
+labels:
+  sigma: 3
+
+model:
+  input_height: 128
+  in_channels: 1
+  out_channels: 32
+  encoder:
+    layers:
+      - block_type: FreqCoordConvDown
+        out_channels: 32
+      - block_type: FreqCoordConvDown
+        out_channels: 64
+      - block_type: LayerGroup
+        layers:
+          - block_type: FreqCoordConvDown
+            out_channels: 128
+          - block_type: ConvBlock
+            out_channels: 256
+  bottleneck:
+    channels: 256
+    self_attention: true
+  decoder:
+    layers:
+      - block_type: FreqCoordConvUp
+        out_channels: 64
+      - block_type: FreqCoordConvUp
+        out_channels: 32
+      - block_type: LayerGroup
+        layers:
+          - block_type: FreqCoordConvUp
+            out_channels: 32
+          - block_type: ConvBlock
+            out_channels: 32
+
+train:
+  batch_size: 8
+  learning_rate: 0.001
+  t_max: 100
+  loss:
+    detection:
+      weight: 1.0
+      focal:
+        beta: 4
+        alpha: 2
+    classification:
+      weight: 2.0
+      focal:
+        beta: 4
+        alpha: 2
+    size:
+      weight: 0.1
+  logger:
+    logger_type: dvclive
+  augmentations:
+    steps:
+      - augmentation_type: mix_audio
+        probability: 0.2
+        min_weight: 0.3
+        max_weight: 0.7
+      - augmentation_type: add_echo
+        probability: 0.2
+        max_delay: 0.005
+        min_weight: 0.0
+        max_weight: 1.0
+      - augmentation_type: scale_volume
+        probability: 0.2
+        min_scaling: 0.0
+        max_scaling: 2.0
+      - augmentation_type: warp
+        probability: 0.2
+        delta: 0.04
+      - augmentation_type: mask_time
+        probability: 0.2
+        max_perc: 0.05
+        max_masks: 3
+      - augmentation_type: mask_freq
+        probability: 0.2
+        max_perc: 0.10
+        max_masks: 3

justfile

@@ -0,0 +1,110 @@
+# Default command, runs if no recipe is specified.
+default:
+    just --list
+
+# Variables
+SOURCE_DIR      := "src"
+TESTS_DIR       := "tests"
+PYTHON_DIRS     := "src tests"
+DOCS_SOURCE     := "docs/source"
+DOCS_BUILD      := "docs/build"
+HTML_COVERAGE_DIR := "htmlcov"
+
+# Show available commands
+help:
+    @just --list
+
+# Testing & Coverage
+# Run tests using pytest.
+test:
+    pytest {{TESTS_DIR}}
+
+# Run tests and generate coverage data.
+coverage:
+    pytest --cov=batdetect2 --cov-report=term-missing --cov-report=xml {{TESTS_DIR}}
+
+# Generate an HTML coverage report.
+coverage-html: coverage
+    @echo "Generating HTML coverage report..."
+    coverage html -d {{HTML_COVERAGE_DIR}}
+    @echo "HTML coverage report generated in {{HTML_COVERAGE_DIR}}/"
+
+# Serve the HTML coverage report locally.
+coverage-serve: coverage-html
+    @echo "Serving report at http://localhost:8000/ ..."
+    python -m http.server --directory {{HTML_COVERAGE_DIR}} 8000
+
+# Documentation
+# Build documentation using Sphinx.
+docs:
+    sphinx-build -b html {{DOCS_SOURCE}} {{DOCS_BUILD}}
+
+# Serve documentation with live reload.
+docs-serve:
+    sphinx-autobuild {{DOCS_SOURCE}} {{DOCS_BUILD}} --watch {{SOURCE_DIR}} --open-browser
+
+# Formatting & Linting
+# Format code using ruff.
+format:
+    ruff format {{PYTHON_DIRS}}
+
+# Check code formatting using ruff.
+format-check:
+    ruff format --check {{PYTHON_DIRS}}
+
+# Lint code using ruff.
+lint:
+    ruff check {{PYTHON_DIRS}}
+
+# Lint code using ruff and apply automatic fixes.
+lint-fix:
+    ruff check --fix {{PYTHON_DIRS}}
+
+# Type Checking
+# Type check code using pyright.
+typecheck:
+    pyright {{PYTHON_DIRS}}
+
+# Combined Checks
+# Run all checks (format-check, lint, typecheck).
+check: format-check lint typecheck test
+
+# Cleaning tasks
+# Remove Python bytecode and cache.
+clean-pyc:
+    find . -type f -name "*.py[co]" -delete
+    find . -type d -name "__pycache__" -exec rm -rf {} +
+
+# Remove test and coverage artifacts.
+clean-test:
+    rm -f .coverage coverage.xml
+    rm -rf .pytest_cache htmlcov/
+
+# Remove built documentation.
+clean-docs:
+    rm -rf {{DOCS_BUILD}}
+
+# Remove package build artifacts.
+clean-build:
+    rm -rf build/ dist/ *.egg-info/
+
+# Remove all build, test, documentation, and Python artifacts.
+clean: clean-build clean-pyc clean-test clean-docs
+
+# Examples
+# Preprocess example data.
+example-preprocess OPTIONS="":
+    batdetect2 preprocess \
+        --base-dir . \
+        --dataset-field datasets.train \
+        --config example_data/config.yaml \
+        {{OPTIONS}} \
+        example_data/datasets.yaml example_data/preprocessed
+
+# Train on example data.
+example-train OPTIONS="":
+    batdetect2 train \
+        --val-dir example_data/preprocessed \
+        --config example_data/config.yaml \
+        {{OPTIONS}} \
+        example_data/preprocessed

pyproject.toml

@@ -85,6 +85,11 @@ dev = [
   "sphinx-book-theme>=1.1.4",
   "autodoc-pydantic>=2.2.0",
   "pytest-cov>=6.1.1",
+  "ty>=0.0.1a12",
+  "rust-just>=1.40.0",
+]
+dvclive = [
+    "dvclive>=3.48.2",
 ]
 
 [tool.ruff]

src/batdetect2/cli/__init__.py

@@ -2,13 +2,13 @@ from batdetect2.cli.base import cli
 from batdetect2.cli.compat import detect
 from batdetect2.cli.data import data
 from batdetect2.cli.preprocess import preprocess
-from batdetect2.cli.train import train
+from batdetect2.cli.train import train_command
 
 __all__ = [
     "cli",
     "detect",
     "data",
-    "train",
+    "train_command",
     "preprocess",
 ]
 

src/batdetect2/cli/preprocess.py

@@ -1,15 +1,18 @@
+import sys
 from pathlib import Path
 from typing import Optional
 
 import click
+import yaml
 from loguru import logger
 
 from batdetect2.cli.base import cli
 from batdetect2.data import load_dataset_from_config
-from batdetect2.preprocess import build_preprocessor, load_preprocessing_config
-from batdetect2.targets import build_targets, load_target_config
-from batdetect2.train import load_label_config, preprocess_annotations
-from batdetect2.train.labels import build_clip_labeler
+from batdetect2.train.preprocess import (
+    TrainPreprocessConfig,
+    load_train_preprocessing_config,
+    preprocess_dataset,
+)
 
 __all__ = ["preprocess"]
 
@@ -44,16 +47,16 @@ __all__ = ["preprocess"]
     ),
 )
 @click.option(
-    "--preprocess-config",
+    "--config",
     type=click.Path(exists=True),
     help=(
-        "Path to the preprocessing configuration file. This file tells "
+        "Path to the configuration file. This file tells "
         "the program how to prepare your audio data before training, such "
         "as resampling or applying filters."
     ),
 )
 @click.option(
-    "--preprocess-config-field",
+    "--config-field",
     type=str,
     help=(
         "If the preprocessing settings are inside a nested dictionary "
@@ -62,41 +65,6 @@ __all__ = ["preprocess"]
         "top level, you don't need to specify this."
     ),
 )
-@click.option(
-    "--label-config",
-    type=click.Path(exists=True),
-    help=(
-        "Path to the label generation configuration file. This file "
-        "contains settings for how to create labels from your "
-        "annotations, which the model uses to learn."
-    ),
-)
-@click.option(
-    "--label-config-field",
-    type=str,
-    help=(
-        "If the label generation settings are inside a nested dictionary "
-        "within the label configuration file, specify the key here. If "
-        "the settings are at the top level, leave this blank."
-    ),
-)
-@click.option(
-    "--target-config",
-    type=click.Path(exists=True),
-    help=(
-        "Path to the training target configuration file. This file "
-        "specifies what sounds the model should learn to predict."
-    ),
-)
-@click.option(
-    "--target-config-field",
-    type=str,
-    help=(
-        "If the target settings are inside a nested dictionary "
-        "within the target configuration file, specify the key here. "
-        "If the settings are at the top level, you don't need to specify this."
-    ),
-)
 @click.option(
     "--force",
     is_flag=True,
@@ -117,20 +85,32 @@ __all__ = ["preprocess"]
         "the program will use all available cores."
     ),
 )
+@click.option(
+    "-v",
+    "--verbose",
+    count=True,
+    help="Increase verbosity. -v for INFO, -vv for DEBUG.",
+)
 def preprocess(
     dataset_config: Path,
     output: Path,
-    target_config: Optional[Path] = None,
     base_dir: Optional[Path] = None,
-    preprocess_config: Optional[Path] = None,
-    label_config: Optional[Path] = None,
+    config: Optional[Path] = None,
+    config_field: Optional[str] = None,
     force: bool = False,
     num_workers: Optional[int] = None,
-    target_config_field: Optional[str] = None,
-    preprocess_config_field: Optional[str] = None,
-    label_config_field: Optional[str] = None,
     dataset_field: Optional[str] = None,
+    verbose: int = 0,
 ):
+    logger.remove()
+    if verbose == 0:
+        log_level = "WARNING"
+    elif verbose == 1:
+        log_level = "INFO"
+    else:
+        log_level = "DEBUG"
+    logger.add(sys.stderr, level=log_level)
+
     logger.info("Starting preprocessing.")
 
     output = Path(output)
@@ -139,31 +119,19 @@ def preprocess(
     base_dir = base_dir or Path.cwd()
     logger.debug("Current working directory: {base_dir}", base_dir=base_dir)
 
-    preprocess = (
-        load_preprocessing_config(
-            preprocess_config,
-            field=preprocess_config_field,
+    if config:
+        logger.info(
+            "Loading preprocessing config from: {config}", config=config
         )
-        if preprocess_config
-        else None
-    )
 
-    target = (
-        load_target_config(
-            target_config,
-            field=target_config_field,
-        )
-        if target_config
-        else None
+    conf = (
+        load_train_preprocessing_config(config, field=config_field)
+        if config is not None
+        else TrainPreprocessConfig()
     )
-
-    label = (
-        load_label_config(
-            label_config,
-            field=label_config_field,
-        )
-        if label_config
-        else None
+    logger.debug(
+        "Preprocessing config:\n{conf}",
+        conf=yaml.dump(conf.model_dump()),
     )
 
     dataset = load_dataset_from_config(
@@ -177,20 +145,10 @@ def preprocess(
         num_examples=len(dataset),
     )
 
-    targets = build_targets(config=target)
-    preprocessor = build_preprocessor(config=preprocess)
-    labeller = build_clip_labeler(targets, config=label)
-
-    if not output.exists():
-        logger.debug("Creating directory {directory}", directory=output)
-        output.mkdir(parents=True)
-
-    logger.info("Will start preprocessing")
-    preprocess_annotations(
+    preprocess_dataset(
         dataset,
-        output_dir=output,
-        preprocessor=preprocessor,
-        labeller=labeller,
-        replace=force,
+        conf,
+        output=output,
+        force=force,
         max_workers=num_workers,
     )

src/batdetect2/cli/train.py

@@ -5,236 +5,53 @@ import click
 from loguru import logger
 
 from batdetect2.cli.base import cli
-from batdetect2.evaluate.metrics import (
-    ClassificationAccuracy,
-    ClassificationMeanAveragePrecision,
-    DetectionAveragePrecision,
+from batdetect2.train import (
+    FullTrainingConfig,
+    load_full_training_config,
+    train,
 )
-from batdetect2.models import build_model
-from batdetect2.models.backbones import load_backbone_config
-from batdetect2.postprocess import build_postprocessor, load_postprocess_config
-from batdetect2.preprocess import build_preprocessor, load_preprocessing_config
-from batdetect2.targets import build_targets, load_target_config
-from batdetect2.train import train
-from batdetect2.train.callbacks import ValidationMetrics
-from batdetect2.train.config import TrainingConfig, load_train_config
 from batdetect2.train.dataset import list_preprocessed_files
 
 __all__ = [
     "train_command",
 ]
 
-DEFAULT_CONFIG_FILE = Path("config.yaml")
-
 
 @cli.command(name="train")
-@click.option(
-    "--train-examples",
-    type=click.Path(exists=True),
-    required=True,
-)
-@click.option("--val-examples", type=click.Path(exists=True))
-@click.option(
-    "--model-path",
-    type=click.Path(exists=True),
-)
-@click.option(
-    "--train-config",
-    type=click.Path(exists=True),
-    default=DEFAULT_CONFIG_FILE,
-)
-@click.option(
-    "--train-config-field",
-    type=str,
-    default="train",
-)
-@click.option(
-    "--preprocess-config",
-    type=click.Path(exists=True),
-    help=(
-        "Path to the preprocessing configuration file. This file tells "
-        "the program how to prepare your audio data before training, such "
-        "as resampling or applying filters."
-    ),
-    default=DEFAULT_CONFIG_FILE,
-)
-@click.option(
-    "--preprocess-config-field",
-    type=str,
-    help=(
-        "If the preprocessing settings are inside a nested dictionary "
-        "within the preprocessing configuration file, specify the key "
-        "here to access them. If the preprocessing settings are at the "
-        "top level, you don't need to specify this."
-    ),
-    default="preprocess",
-)
-@click.option(
-    "--target-config",
-    type=click.Path(exists=True),
-    help=(
-        "Path to the training target configuration file. This file "
-        "specifies what sounds the model should learn to predict."
-    ),
-    default=DEFAULT_CONFIG_FILE,
-)
-@click.option(
-    "--target-config-field",
-    type=str,
-    help=(
-        "If the target settings are inside a nested dictionary "
-        "within the target configuration file, specify the key here. "
-        "If the settings are at the top level, you don't need to specify this."
-    ),
-    default="targets",
-)
-@click.option(
-    "--postprocess-config",
-    type=click.Path(exists=True),
-    default=DEFAULT_CONFIG_FILE,
-)
-@click.option(
-    "--postprocess-config-field",
-    type=str,
-    default="postprocess",
-)
-@click.option(
-    "--model-config",
-    type=click.Path(exists=True),
-    default=DEFAULT_CONFIG_FILE,
-)
-@click.option(
-    "--model-config-field",
-    type=str,
-    default="model",
-)
-@click.option(
-    "--train-workers",
-    type=int,
-    default=0,
-)
-@click.option(
-    "--val-workers",
-    type=int,
-    default=0,
-)
+@click.argument("train_dir", type=click.Path(exists=True))
+@click.option("--val-dir", type=click.Path(exists=True))
+@click.option("--model-path", type=click.Path(exists=True))
+@click.option("--config", type=click.Path(exists=True))
+@click.option("--config-field", type=str)
+@click.option("--train-workers", type=int, default=0)
+@click.option("--val-workers", type=int, default=0)
 def train_command(
-    train_examples: Path,
-    val_examples: Optional[Path] = None,
+    train_dir: Path,
+    val_dir: Optional[Path] = None,
     model_path: Optional[Path] = None,
-    train_config: Path = DEFAULT_CONFIG_FILE,
-    train_config_field: str = "train",
-    preprocess_config: Path = DEFAULT_CONFIG_FILE,
-    preprocess_config_field: str = "preprocess",
-    target_config: Path = DEFAULT_CONFIG_FILE,
-    target_config_field: str = "targets",
-    postprocess_config: Path = DEFAULT_CONFIG_FILE,
-    postprocess_config_field: str = "postprocess",
-    model_config: Path = DEFAULT_CONFIG_FILE,
-    model_config_field: str = "model",
+    config: Optional[Path] = None,
+    config_field: Optional[str] = None,
     train_workers: int = 0,
     val_workers: int = 0,
 ):
     logger.info("Starting training!")
 
-    try:
-        target_config_loaded = load_target_config(
-            path=target_config,
-            field=target_config_field,
-        )
-        targets = build_targets(config=target_config_loaded)
-        logger.debug(
-            "Loaded targets info from config file {path}", path=target_config
-        )
-    except IOError:
-        logger.debug(
-            "Could not load target info from config file, using default"
-        )
-        targets = build_targets()
-
-    try:
-        preprocess_config_loaded = load_preprocessing_config(
-            path=preprocess_config,
-            field=preprocess_config_field,
-        )
-        preprocessor = build_preprocessor(preprocess_config_loaded)
-        logger.debug(
-            "Loaded preprocessor from config file {path}", path=target_config
-        )
-
-    except IOError:
-        logger.debug(
-            "Could not load preprocessor from config file, using default"
-        )
-        preprocessor = build_preprocessor()
-
-    try:
-        model_config_loaded = load_backbone_config(
-            path=model_config, field=model_config_field
-        )
-        model = build_model(
-            num_classes=len(targets.class_names),
-            config=model_config_loaded,
-        )
-    except IOError:
-        model = build_model(num_classes=len(targets.class_names))
-
-    try:
-        postprocess_config_loaded = load_postprocess_config(
-            path=postprocess_config,
-            field=postprocess_config_field,
-        )
-        postprocessor = build_postprocessor(
-            targets=targets,
-            config=postprocess_config_loaded,
-        )
-        logger.debug(
-            "Loaded postprocessor from file {path}", path=postprocess_config
-        )
-    except IOError:
-        logger.debug(
-            "Could not load postprocessor config from file. Using default"
-        )
-        postprocessor = build_postprocessor(targets=targets)
-
-    try:
-        train_config_loaded = load_train_config(
-            path=train_config, field=train_config_field
-        )
-        logger.debug(
-            "Loaded training config from file {path}",
-            path=train_config,
-        )
-    except IOError:
-        train_config_loaded = TrainingConfig()
-        logger.debug("Could not load training config from file. Using default")
-
-    train_files = list_preprocessed_files(train_examples)
-
-    val_files = (
-        None if val_examples is None else list_preprocessed_files(val_examples)
+    conf = (
+        load_full_training_config(config, field=config_field)
+        if config is not None
+        else FullTrainingConfig()
     )
 
-    return train(
-        detector=model,
-        train_examples=train_files,  # type: ignore
-        val_examples=val_files,  # type: ignore
+    train_examples = list_preprocessed_files(train_dir)
+    val_examples = (
+        list_preprocessed_files(val_dir) if val_dir is not None else None
+    )
+
+    train(
+        train_examples=train_examples,
+        val_examples=val_examples,
+        config=conf,
         model_path=model_path,
-        preprocessor=preprocessor,
-        postprocessor=postprocessor,
-        targets=targets,
-        config=train_config_loaded,
-        callbacks=[
-            ValidationMetrics(
-                metrics=[
-                    DetectionAveragePrecision(),
-                    ClassificationMeanAveragePrecision(
-                        class_names=targets.class_names,
-                    ),
-                    ClassificationAccuracy(class_names=targets.class_names),
-                ]
-            )
-        ],
         train_workers=train_workers,
         val_workers=val_workers,
     )

src/batdetect2/configs.py

@@ -25,20 +25,9 @@ class BaseConfig(BaseModel):
 
     Inherits from Pydantic's `BaseModel` to provide data validation, parsing,
     and serialization capabilities.
-
-    It sets `extra='forbid'` in its model configuration, meaning that any
-    fields provided in a configuration file that are *not* explicitly defined
-    in the specific configuration schema will raise a validation error. This
-    helps catch typos and ensures configurations strictly adhere to the expected
-    structure.
-
-    Attributes
-    ----------
-    model_config : ConfigDict
-        Pydantic model configuration dictionary. Set to forbid extra fields.
     """
 
-    model_config = ConfigDict(extra="forbid")
+    model_config = ConfigDict(extra="ignore")
 
 
 T = TypeVar("T", bound=BaseModel)

src/batdetect2/models/backbones.py

@@ -27,9 +27,23 @@ from torch import nn
 
 from batdetect2.configs import BaseConfig, load_config
 from batdetect2.models.blocks import ConvBlock
-from batdetect2.models.bottleneck import BottleneckConfig, build_bottleneck
-from batdetect2.models.decoder import Decoder, DecoderConfig, build_decoder
-from batdetect2.models.encoder import Encoder, EncoderConfig, build_encoder
+from batdetect2.models.bottleneck import (
+    DEFAULT_BOTTLENECK_CONFIG,
+    BottleneckConfig,
+    build_bottleneck,
+)
+from batdetect2.models.decoder import (
+    DEFAULT_DECODER_CONFIG,
+    Decoder,
+    DecoderConfig,
+    build_decoder,
+)
+from batdetect2.models.encoder import (
+    DEFAULT_ENCODER_CONFIG,
+    Encoder,
+    EncoderConfig,
+    build_encoder,
+)
 from batdetect2.models.types import BackboneModel
 
 __all__ = [
@@ -186,9 +200,9 @@ class BackboneConfig(BaseConfig):
 
     input_height: int = 128
     in_channels: int = 1
-    encoder: Optional[EncoderConfig] = None
-    bottleneck: Optional[BottleneckConfig] = None
-    decoder: Optional[DecoderConfig] = None
+    encoder: EncoderConfig = DEFAULT_ENCODER_CONFIG
+    bottleneck: BottleneckConfig = DEFAULT_BOTTLENECK_CONFIG
+    decoder: DecoderConfig = DEFAULT_DECODER_CONFIG
     out_channels: int = 32
 
 

src/batdetect2/models/blocks.py

@@ -38,7 +38,7 @@ from batdetect2.configs import BaseConfig
 
 __all__ = [
     "ConvBlock",
-    "BlockGroupConfig",
+    "LayerGroupConfig",
     "VerticalConv",
     "FreqCoordConvDownBlock",
     "StandardConvDownBlock",
@@ -654,16 +654,16 @@ LayerConfig = Annotated[
         StandardConvDownConfig,
         FreqCoordConvUpConfig,
         StandardConvUpConfig,
-        "BlockGroupConfig",
+        "LayerGroupConfig",
     ],
     Field(discriminator="block_type"),
 ]
 """Type alias for the discriminated union of block configuration models."""
 
 
-class BlockGroupConfig(BaseConfig):
-    block_type: Literal["group"] = "group"
-    blocks: List[LayerConfig]
+class LayerGroupConfig(BaseConfig):
+    block_type: Literal["LayerGroup"] = "LayerGroup"
+    layers: List[LayerConfig]
 
 
 def build_layer_from_config(
@@ -769,13 +769,13 @@ def build_layer_from_config(
             input_height * 2,
         )
 
-    if config.block_type == "group":
+    if config.block_type == "LayerGroup":
         current_channels = in_channels
         current_height = input_height
 
         blocks = []
 
-        for block_config in config.blocks:
+        for block_config in config.layers:
             block, current_channels, current_height = build_layer_from_config(
                 input_height=current_height,
                 in_channels=current_channels,

src/batdetect2/models/decoder.py

@@ -26,7 +26,7 @@ from torch import nn
 
 from batdetect2.configs import BaseConfig
 from batdetect2.models.blocks import (
-    BlockGroupConfig,
+    LayerGroupConfig,
     ConvConfig,
     FreqCoordConvUpConfig,
     StandardConvUpConfig,
@@ -45,7 +45,7 @@ DecoderLayerConfig = Annotated[
         ConvConfig,
         FreqCoordConvUpConfig,
         StandardConvUpConfig,
-        BlockGroupConfig,
+        LayerGroupConfig,
     ],
     Field(discriminator="block_type"),
 ]
@@ -197,8 +197,8 @@ DEFAULT_DECODER_CONFIG: DecoderConfig = DecoderConfig(
     layers=[
         FreqCoordConvUpConfig(out_channels=64),
         FreqCoordConvUpConfig(out_channels=32),
-        BlockGroupConfig(
-            blocks=[
+        LayerGroupConfig(
+            layers=[
                 FreqCoordConvUpConfig(out_channels=32),
                 ConvConfig(out_channels=32),
             ]

src/batdetect2/models/encoder.py

@@ -28,7 +28,7 @@ from torch import nn
 
 from batdetect2.configs import BaseConfig
 from batdetect2.models.blocks import (
-    BlockGroupConfig,
+    LayerGroupConfig,
     ConvConfig,
     FreqCoordConvDownConfig,
     StandardConvDownConfig,
@@ -47,7 +47,7 @@ EncoderLayerConfig = Annotated[
         ConvConfig,
         FreqCoordConvDownConfig,
         StandardConvDownConfig,
-        BlockGroupConfig,
+        LayerGroupConfig,
     ],
     Field(discriminator="block_type"),
 ]
@@ -230,8 +230,8 @@ DEFAULT_ENCODER_CONFIG: EncoderConfig = EncoderConfig(
     layers=[
         FreqCoordConvDownConfig(out_channels=32),
         FreqCoordConvDownConfig(out_channels=64),
-        BlockGroupConfig(
-            blocks=[
+        LayerGroupConfig(
+            layers=[
                 FreqCoordConvDownConfig(out_channels=128),
                 ConvConfig(out_channels=256),
             ]

src/batdetect2/train/__init__.py

@@ -15,8 +15,10 @@ from batdetect2.train.augmentations import (
 )
 from batdetect2.train.clips import build_clipper, select_subclip
 from batdetect2.train.config import (
-    TrainerConfig,
+    FullTrainingConfig,
+    PLTrainerConfig,
     TrainingConfig,
+    load_full_training_config,
     load_train_config,
 )
 from batdetect2.train.dataset import (
@@ -26,6 +28,7 @@ from batdetect2.train.dataset import (
     list_preprocessed_files,
 )
 from batdetect2.train.labels import build_clip_labeler, load_label_config
+from batdetect2.train.lightning import TrainingModule
 from batdetect2.train.losses import (
     ClassificationLossConfig,
     DetectionLossConfig,
@@ -40,7 +43,10 @@ from batdetect2.train.preprocess import (
 )
 from batdetect2.train.train import (
     build_train_dataset,
+    build_train_loader,
+    build_trainer,
     build_val_dataset,
+    build_val_loader,
     train,
 )
 
@@ -50,15 +56,17 @@ __all__ = [
     "DetectionLossConfig",
     "EchoAugmentationConfig",
     "FrequencyMaskAugmentationConfig",
+    "FullTrainingConfig",
     "LabeledDataset",
     "LossConfig",
     "LossFunction",
+    "PLTrainerConfig",
     "RandomExampleSource",
     "SizeLossConfig",
     "TimeMaskAugmentationConfig",
     "TrainExample",
-    "TrainerConfig",
     "TrainingConfig",
+    "TrainingModule",
     "VolumeAugmentationConfig",
     "WarpAugmentationConfig",
     "add_echo",
@@ -67,9 +75,13 @@ __all__ = [
     "build_clipper",
     "build_loss",
     "build_train_dataset",
+    "build_train_loader",
+    "build_trainer",
     "build_val_dataset",
+    "build_val_loader",
     "generate_train_example",
     "list_preprocessed_files",
+    "load_full_training_config",
     "load_label_config",
     "load_train_config",
     "mask_frequency",
@@ -79,6 +91,5 @@ __all__ = [
     "scale_volume",
     "select_subclip",
     "train",
-    "train",
     "warp_spectrogram",
 ]

src/batdetect2/train/config.py

@@ -4,26 +4,27 @@ from pydantic import Field
 from soundevent import data
 
 from batdetect2.configs import BaseConfig, load_config
+from batdetect2.models import BackboneConfig
+from batdetect2.postprocess import PostprocessConfig
+from batdetect2.preprocess import PreprocessingConfig
+from batdetect2.targets import TargetConfig
 from batdetect2.train.augmentations import (
     DEFAULT_AUGMENTATION_CONFIG,
     AugmentationsConfig,
 )
 from batdetect2.train.clips import ClipingConfig
+from batdetect2.train.logging import CSVLoggerConfig, LoggerConfig
 from batdetect2.train.losses import LossConfig
 
 __all__ = [
-    "OptimizerConfig",
     "TrainingConfig",
     "load_train_config",
+    "FullTrainingConfig",
+    "load_full_training_config",
 ]
 
 
-class OptimizerConfig(BaseConfig):
-    learning_rate: float = 1e-3
-    t_max: int = 100
-
-
-class TrainerConfig(BaseConfig):
+class PLTrainerConfig(BaseConfig):
     accelerator: str = "auto"
     accumulate_grad_batches: int = 1
     deterministic: bool = True
@@ -44,20 +45,17 @@ class TrainerConfig(BaseConfig):
     val_check_interval: Optional[Union[int, float]] = None
 
 
-class TrainingConfig(BaseConfig):
+class TrainingConfig(PLTrainerConfig):
     batch_size: int = 8
-
+    learning_rate: float = 1e-3
+    t_max: int = 100
     loss: LossConfig = Field(default_factory=LossConfig)
-
-    optimizer: OptimizerConfig = Field(default_factory=OptimizerConfig)
-
     augmentations: AugmentationsConfig = Field(
         default_factory=lambda: DEFAULT_AUGMENTATION_CONFIG
     )
-
     cliping: ClipingConfig = Field(default_factory=ClipingConfig)
-
-    trainer: TrainerConfig = Field(default_factory=TrainerConfig)
+    trainer: PLTrainerConfig = Field(default_factory=PLTrainerConfig)
+    logger: LoggerConfig = Field(default_factory=CSVLoggerConfig)
 
 
 def load_train_config(
@@ -65,3 +63,23 @@ def load_train_config(
     field: Optional[str] = None,
 ) -> TrainingConfig:
     return load_config(path, schema=TrainingConfig, field=field)
+
+
+class FullTrainingConfig(BaseConfig):
+    """Full training configuration."""
+
+    train: TrainingConfig = Field(default_factory=TrainingConfig)
+    targets: TargetConfig = Field(default_factory=TargetConfig)
+    model: BackboneConfig = Field(default_factory=BackboneConfig)
+    preprocess: PreprocessingConfig = Field(
+        default_factory=PreprocessingConfig
+    )
+    postprocess: PostprocessConfig = Field(default_factory=PostprocessConfig)
+
+
+def load_full_training_config(
+    path: data.PathLike,
+    field: Optional[str] = None,
+) -> FullTrainingConfig:
+    """Load the full training configuration."""
+    return load_config(path, schema=FullTrainingConfig, field=field)

src/batdetect2/train/lightning.py

@@ -1,17 +1,16 @@
 import lightning as L
 import torch
+from pydantic import BaseModel
 from torch.optim.adam import Adam
 from torch.optim.lr_scheduler import CosineAnnealingLR
 
-from batdetect2.models import (
-    DetectionModel,
-    ModelOutput,
-)
-from batdetect2.postprocess.types import PostprocessorProtocol
-from batdetect2.preprocess.types import PreprocessorProtocol
-from batdetect2.targets.types import TargetProtocol
+from batdetect2.models import ModelOutput, build_model
+from batdetect2.postprocess import build_postprocessor
+from batdetect2.preprocess import build_preprocessor
+from batdetect2.targets import build_targets
 from batdetect2.train import TrainExample
-from batdetect2.train.types import LossProtocol
+from batdetect2.train.config import FullTrainingConfig
+from batdetect2.train.losses import build_loss
 
 __all__ = [
     "TrainingModule",
@@ -19,28 +18,29 @@ __all__ = [
 
 
 class TrainingModule(L.LightningModule):
-    def __init__(
-        self,
-        detector: DetectionModel,
-        loss: LossProtocol,
-        targets: TargetProtocol,
-        preprocessor: PreprocessorProtocol,
-        postprocessor: PostprocessorProtocol,
-        learning_rate: float = 0.001,
-        t_max: int = 100,
-    ):
+    def __init__(self, config: FullTrainingConfig):
         super().__init__()
 
-        self.loss = loss
-        self.detector = detector
-        self.preprocessor = preprocessor
-        self.targets = targets
-        self.postprocessor = postprocessor
+        # NOTE: Need to convert to vanilla python object so that DVCLive can
+        # store it.
+        self._config = (
+            config.model_dump() if isinstance(config, BaseModel) else config
+        )
+        self.save_hyperparameters({"config": self._config})
 
-        self.learning_rate = learning_rate
-        self.t_max = t_max
-
-        self.save_hyperparameters()
+        self.config = FullTrainingConfig.model_validate(self._config)
+        self.loss = build_loss(self.config.train.loss)
+        self.targets = build_targets(self.config.targets)
+        self.detector = build_model(
+            num_classes=len(self.targets.class_names),
+            config=self.config.model,
+        )
+        self.preprocessor = build_preprocessor(self.config.preprocess)
+        self.postprocessor = build_postprocessor(
+            self.targets,
+            min_freq=self.preprocessor.min_freq,
+            max_freq=self.preprocessor.max_freq,
+        )
 
     def forward(self, spec: torch.Tensor) -> ModelOutput:
         return self.detector(spec)
@@ -70,6 +70,6 @@ class TrainingModule(L.LightningModule):
         return outputs
 
     def configure_optimizers(self):
-        optimizer = Adam(self.parameters(), lr=self.learning_rate)
-        scheduler = CosineAnnealingLR(optimizer, T_max=self.t_max)
+        optimizer = Adam(self.parameters(), lr=self.config.train.learning_rate)
+        scheduler = CosineAnnealingLR(optimizer, T_max=self.config.train.t_max)
         return [optimizer], [scheduler]

src/batdetect2/train/logging.py

@@ -0,0 +1,103 @@
+from typing import Annotated, Literal, Optional, Union
+
+from lightning.pytorch.loggers import Logger
+from pydantic import Field
+
+from batdetect2.configs import BaseConfig
+
+DEFAULT_LOGS_DIR: str = "logs"
+
+
+class DVCLiveConfig(BaseConfig):
+    logger_type: Literal["dvclive"] = "dvclive"
+    dir: str = DEFAULT_LOGS_DIR
+    run_name: Optional[str] = None
+    prefix: str = ""
+    log_model: Union[bool, Literal["all"]] = False
+    monitor_system: bool = False
+
+
+class CSVLoggerConfig(BaseConfig):
+    logger_type: Literal["csv"] = "csv"
+    save_dir: str = DEFAULT_LOGS_DIR
+    name: Optional[str] = "logs"
+    version: Optional[str] = None
+    flush_logs_every_n_steps: int = 100
+
+
+class TensorBoardLoggerConfig(BaseConfig):
+    logger_type: Literal["tensorboard"] = "tensorboard"
+    save_dir: str = DEFAULT_LOGS_DIR
+    name: Optional[str] = "default"
+    version: Optional[str] = None
+    log_graph: bool = False
+    flush_logs_every_n_steps: Optional[int] = None
+
+
+LoggerConfig = Annotated[
+    Union[DVCLiveConfig, CSVLoggerConfig, TensorBoardLoggerConfig],
+    Field(discriminator="logger_type"),
+]
+
+
+def create_dvclive_logger(config: DVCLiveConfig) -> Logger:
+    try:
+        from dvclive.lightning import DVCLiveLogger  # type: ignore
+    except ImportError as error:
+        raise ValueError(
+            "DVCLive is not installed and cannot be used for logging"
+            "Make sure you have it installed by running `pip install dvclive`"
+            "or `uv add dvclive`"
+        ) from error
+
+    return DVCLiveLogger(
+        dir=config.dir,
+        run_name=config.run_name,
+        prefix=config.prefix,
+        log_model=config.log_model,
+        monitor_system=config.monitor_system,
+    )
+
+
+def create_csv_logger(config: CSVLoggerConfig) -> Logger:
+    from lightning.pytorch.loggers import CSVLogger
+
+    return CSVLogger(
+        save_dir=config.save_dir,
+        name=config.name,
+        version=config.version,
+        flush_logs_every_n_steps=config.flush_logs_every_n_steps,
+    )
+
+
+def create_tensorboard_logger(config: TensorBoardLoggerConfig) -> Logger:
+    from lightning.pytorch.loggers import TensorBoardLogger
+
+    return TensorBoardLogger(
+        save_dir=config.save_dir,
+        name=config.name,
+        version=config.version,
+        log_graph=config.log_graph,
+        flush_logs_every_n_steps=config.flush_logs_every_n_steps,
+    )
+
+
+LOGGER_FACTORY = {
+    "dvclive": create_dvclive_logger,
+    "csv": create_csv_logger,
+    "tensorboard": create_tensorboard_logger,
+}
+
+
+def build_logger(config: LoggerConfig) -> Logger:
+    """
+    Creates a logger instance from a validated Pydantic config object.
+    """
+    logger_type = config.logger_type
+
+    if logger_type not in LOGGER_FACTORY:
+        raise ValueError(f"Unknown logger type: {logger_type}")
+
+    creation_func = LOGGER_FACTORY[logger_type]
+
+    return creation_func(config)

src/batdetect2/train/preprocess.py

@@ -27,22 +27,71 @@ from typing import Callable, Optional, Sequence
 
 import xarray as xr
 from loguru import logger
+from pydantic import Field
 from soundevent import data
 from tqdm.auto import tqdm
 
+from batdetect2.configs import BaseConfig, load_config
+from batdetect2.data.datasets import Dataset
+from batdetect2.preprocess import PreprocessingConfig, build_preprocessor
 from batdetect2.preprocess.types import PreprocessorProtocol
+from batdetect2.targets import TargetConfig, build_targets
+from batdetect2.train.labels import LabelConfig, build_clip_labeler
 from batdetect2.train.types import ClipLabeller
 
 __all__ = [
     "preprocess_annotations",
     "preprocess_single_annotation",
     "generate_train_example",
+    "preprocess_dataset",
+    "TrainPreprocessConfig",
+    "load_train_preprocessing_config",
 ]
 
 FilenameFn = Callable[[data.ClipAnnotation], str]
 """Type alias for a function that generates an output filename."""
 
 
+class TrainPreprocessConfig(BaseConfig):
+    preprocess: PreprocessingConfig = Field(
+        default_factory=PreprocessingConfig
+    )
+    targets: TargetConfig = Field(default_factory=TargetConfig)
+    labels: LabelConfig = Field(default_factory=LabelConfig)
+
+
+def load_train_preprocessing_config(
+    path: data.PathLike,
+    field: Optional[str] = None,
+) -> TrainPreprocessConfig:
+    return load_config(path=path, schema=TrainPreprocessConfig, field=field)
+
+
+def preprocess_dataset(
+    dataset: Dataset,
+    config: TrainPreprocessConfig,
+    output: Path,
+    force: bool = False,
+    max_workers: Optional[int] = None,
+) -> None:
+    targets = build_targets(config=config.targets)
+    preprocessor = build_preprocessor(config=config.preprocess)
+    labeller = build_clip_labeler(targets, config=config.labels)
+
+    if not output.exists():
+        logger.debug("Creating directory {directory}", directory=output)
+        output.mkdir(parents=True)
+
+    preprocess_annotations(
+        dataset,
+        output_dir=output,
+        preprocessor=preprocessor,
+        labeller=labeller,
+        replace=force,
+        max_workers=max_workers,
+    )
+
+
 def generate_train_example(
     clip_annotation: data.ClipAnnotation,
     preprocessor: PreprocessorProtocol,
@@ -207,8 +256,17 @@ def preprocess_annotations(
     output_dir = Path(output_dir)
 
     if not output_dir.is_dir():
+        logger.info(
+            "Creating output directory: {output_dir}", output_dir=output_dir
+        )
         output_dir.mkdir(parents=True)
 
+    logger.info(
+        "Starting preprocessing of {num_annotations} annotations with {max_workers} workers.",
+        num_annotations=len(clip_annotations),
+        max_workers=max_workers or "all available",
+    )
+
     with Pool(max_workers) as pool:
         list(
             tqdm(
@@ -224,8 +282,10 @@ def preprocess_annotations(
                     clip_annotations,
                 ),
                 total=len(clip_annotations),
+                desc="Preprocessing annotations",
             )
         )
+    logger.info("Finished preprocessing.")
 
 
 def preprocess_single_annotation(
@@ -264,11 +324,15 @@ def preprocess_single_annotation(
     path = output_dir / filename
 
     if path.is_file() and not replace:
+        logger.debug("Skipping existing file: {path}", path=path)
         return
 
     if path.is_file() and replace:
+        logger.debug("Removing existing file: {path}", path=path)
         path.unlink()
 
+    logger.debug("Processing annotation {uuid}", uuid=clip_annotation.uuid)
+
     try:
         sample = generate_train_example(
             clip_annotation,
@@ -277,8 +341,9 @@ def preprocess_single_annotation(
         )
     except Exception as error:
         logger.error(
-            "Failed to process annotation: {uuid}. Error {error}",
+            "Failed to process annotation {uuid} to {path}. Error: {error}",
             uuid=clip_annotation.uuid,
+            path=path,
             error=error,
         )
         return

src/batdetect2/train/train.py

@@ -1,3 +1,4 @@
+from collections.abc import Sequence
 from typing import List, Optional
 
 from lightning import Trainer
@@ -5,109 +6,74 @@ from lightning.pytorch.callbacks import Callback
 from soundevent import data
 from torch.utils.data import DataLoader
 
-from batdetect2.models.types import DetectionModel
-from batdetect2.postprocess import build_postprocessor
-from batdetect2.postprocess.types import PostprocessorProtocol
-from batdetect2.preprocess import build_preprocessor
-from batdetect2.preprocess.types import PreprocessorProtocol
-from batdetect2.targets import build_targets
-from batdetect2.targets.types import TargetProtocol
-from batdetect2.train.augmentations import (
-    build_augmentations,
+from batdetect2.evaluate.metrics import (
+    ClassificationAccuracy,
+    ClassificationMeanAveragePrecision,
+    DetectionAveragePrecision,
 )
+from batdetect2.preprocess import (
+    PreprocessorProtocol,
+)
+from batdetect2.targets import TargetProtocol
+from batdetect2.train.augmentations import build_augmentations
+from batdetect2.train.callbacks import ValidationMetrics
 from batdetect2.train.clips import build_clipper
-from batdetect2.train.config import TrainingConfig
+from batdetect2.train.config import (
+    FullTrainingConfig,
+    PLTrainerConfig,
+    TrainingConfig,
+)
 from batdetect2.train.dataset import (
     LabeledDataset,
     RandomExampleSource,
     collate_fn,
 )
 from batdetect2.train.lightning import TrainingModule
-from batdetect2.train.losses import build_loss
+from batdetect2.train.logging import build_logger
 
 __all__ = [
-    "train",
-    "build_val_dataset",
     "build_train_dataset",
+    "build_train_loader",
+    "build_trainer",
+    "build_val_dataset",
+    "build_val_loader",
+    "train",
 ]
 
 
 def train(
-    detector: DetectionModel,
-    train_examples: List[data.PathLike],
-    targets: Optional[TargetProtocol] = None,
-    preprocessor: Optional[PreprocessorProtocol] = None,
-    postprocessor: Optional[PostprocessorProtocol] = None,
-    val_examples: Optional[List[data.PathLike]] = None,
-    config: Optional[TrainingConfig] = None,
-    callbacks: Optional[List[Callback]] = None,
+    train_examples: Sequence[data.PathLike],
+    val_examples: Optional[Sequence[data.PathLike]] = None,
+    config: Optional[FullTrainingConfig] = None,
     model_path: Optional[data.PathLike] = None,
     train_workers: int = 0,
     val_workers: int = 0,
-    **trainer_kwargs,
-) -> None:
-    config = config or TrainingConfig()
-    if model_path is None:
-        if preprocessor is None:
-            preprocessor = build_preprocessor()
+):
+    conf = config or FullTrainingConfig()
 
-        if targets is None:
-            targets = build_targets()
-
-        if postprocessor is None:
-            postprocessor = build_postprocessor(
-                targets,
-                min_freq=preprocessor.min_freq,
-                max_freq=preprocessor.max_freq,
-            )
-
-        loss = build_loss(config.loss)
-
-        module = TrainingModule(
-            detector=detector,
-            loss=loss,
-            targets=targets,
-            preprocessor=preprocessor,
-            postprocessor=postprocessor,
-            learning_rate=config.optimizer.learning_rate,
-            t_max=config.optimizer.t_max,
-        )
-    else:
+    if model_path is not None:
         module = TrainingModule.load_from_checkpoint(model_path)  # type: ignore
+    else:
+        module = TrainingModule(conf)
 
-    train_dataset = build_train_dataset(
+    trainer = build_trainer(conf, targets=module.targets)
+
+    train_dataloader = build_train_loader(
         train_examples,
         preprocessor=module.preprocessor,
-        config=config,
-    )
-
-    trainer = Trainer(
-        **config.trainer.model_dump(exclude_none=True),
-        callbacks=callbacks,
-        **trainer_kwargs,
-    )
-
-    train_dataloader = DataLoader(
-        train_dataset,
-        batch_size=config.batch_size,
-        shuffle=True,
+        config=conf.train,
         num_workers=train_workers,
-        collate_fn=collate_fn,
     )
 
-    val_dataloader = None
-    if val_examples:
-        val_dataset = build_val_dataset(
+    val_dataloader = (
+        build_val_loader(
             val_examples,
-            config=config,
-        )
-        val_dataloader = DataLoader(
-            val_dataset,
-            batch_size=config.batch_size,
-            shuffle=False,
+            config=conf.train,
             num_workers=val_workers,
-            collate_fn=collate_fn,
         )
+        if val_examples is not None
+        else None
+    )
 
     trainer.fit(
         module,
@@ -116,8 +82,76 @@ def train(
     )
 
 
+def build_trainer_callbacks(targets: TargetProtocol) -> List[Callback]:
+    return [
+        ValidationMetrics(
+            metrics=[
+                DetectionAveragePrecision(),
+                ClassificationMeanAveragePrecision(
+                    class_names=targets.class_names
+                ),
+                ClassificationAccuracy(class_names=targets.class_names),
+            ]
+        )
+    ]
+
+
+def build_trainer(
+    conf: FullTrainingConfig,
+    targets: TargetProtocol,
+) -> Trainer:
+    trainer_conf = PLTrainerConfig.model_validate(
+        conf.train.model_dump(mode="python")
+    )
+    return Trainer(
+        **trainer_conf.model_dump(exclude_none=True),
+        val_check_interval=conf.train.val_check_interval,
+        logger=build_logger(conf.train.logger),
+        callbacks=build_trainer_callbacks(targets),
+    )
+
+
+def build_train_loader(
+    train_examples: Sequence[data.PathLike],
+    preprocessor: PreprocessorProtocol,
+    config: TrainingConfig,
+    num_workers: Optional[int] = None,
+) -> DataLoader:
+    train_dataset = build_train_dataset(
+        train_examples,
+        preprocessor=preprocessor,
+        config=config,
+    )
+
+    return DataLoader(
+        train_dataset,
+        batch_size=config.batch_size,
+        shuffle=True,
+        num_workers=num_workers or 0,
+        collate_fn=collate_fn,
+    )
+
+
+def build_val_loader(
+    val_examples: Sequence[data.PathLike],
+    config: TrainingConfig,
+    num_workers: Optional[int] = None,
+):
+    val_dataset = build_val_dataset(
+        val_examples,
+        config=config,
+    )
+    return DataLoader(
+        val_dataset,
+        batch_size=config.batch_size,
+        shuffle=False,
+        num_workers=num_workers or 0,
+        collate_fn=collate_fn,
+    )
+
+
 def build_train_dataset(
-    examples: List[data.PathLike],
+    examples: Sequence[data.PathLike],
     preprocessor: PreprocessorProtocol,
     config: Optional[TrainingConfig] = None,
 ) -> LabeledDataset:
@@ -126,7 +160,7 @@ def build_train_dataset(
     clipper = build_clipper(config.cliping, random=True)
 
     random_example_source = RandomExampleSource(
-        examples,
+        list(examples),
         clipper=clipper,
     )
 
@@ -144,7 +178,7 @@ def build_train_dataset(
 
 
 def build_val_dataset(
-    examples: List[data.PathLike],
+    examples: Sequence[data.PathLike],
     config: Optional[TrainingConfig] = None,
     train: bool = True,
 ) -> LabeledDataset:

tests/test_train/test_config.py

@@ -0,0 +1,10 @@
+from batdetect2.configs import load_config
+from batdetect2.train import FullTrainingConfig
+
+
+def test_example_config_is_valid(example_data_dir):
+    conf = load_config(
+        example_data_dir / "config.yaml",
+        schema=FullTrainingConfig,
+    )
+    assert isinstance(conf, FullTrainingConfig)

tests/test_train/test_lightning.py

@@ -5,27 +5,11 @@ import torch
 import xarray as xr
 from soundevent import data
 
-from batdetect2.models import build_model
-from batdetect2.postprocess import build_postprocessor
-from batdetect2.preprocess import build_preprocessor
-from batdetect2.targets import build_targets
-from batdetect2.train.lightning import TrainingModule
-from batdetect2.train.losses import build_loss
+from batdetect2.train import FullTrainingConfig, TrainingModule
 
 
 def build_default_module():
-    loss = build_loss()
-    targets = build_targets()
-    detector = build_model(num_classes=len(targets.class_names))
-    preprocessor = build_preprocessor()
-    postprocessor = build_postprocessor(targets)
-    return TrainingModule(
-        detector=detector,
-        loss=loss,
-        targets=targets,
-        preprocessor=preprocessor,
-        postprocessor=postprocessor,
-    )
+    return TrainingModule(FullTrainingConfig())
 
 
 def test_can_initialize_default_module():