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BirdNET Model Path Configuration Fix

Problem

ChirpKit successfully downloads BirdNET models to ~/.chirpkit/models/birdnet/, but BirdNET-Analyzer was not configured to use these downloaded models. Instead, it tried to use models from the BirdNET-Analyzer package directory, which may not exist.

The Fix

Updated src/chirpkit/transfer_learning/birdnet_embeddings.py lines 84-115 to configure BirdNET-Analyzer to use ChirpKit's downloaded models.

Before (BROKEN)

def _init_with_analyzer(self):
    """Initialize using full BirdNET-Analyzer"""
    # Only checks if BIRDNET_MODEL_PATH exists
    if hasattr(birdnet_cfg, 'BIRDNET_MODEL_PATH'):
        birdnet_cfg.MODEL_PATH = birdnet_cfg.BIRDNET_MODEL_PATH
    if hasattr(birdnet_cfg, 'BIRDNET_LABELS_FILE'):
        birdnet_cfg.LABELS_FILE = birdnet_cfg.BIRDNET_LABELS_FILE

    # ... rest of config ...
    birdnet_model.load_model(class_output=False)

Problem: Never checks ChirpKit's ~/.chirpkit/models/birdnet/ directory!

After (FIXED)

def _init_with_analyzer(self):
    """Initialize using full BirdNET-Analyzer"""
    # Point to ChirpKit's downloaded models in ~/.chirpkit/models/birdnet/
    chirpkit_model_dir = Path.home() / '.chirpkit' / 'models' / 'birdnet'

    if chirpkit_model_dir.exists():
        # Use ChirpKit's downloaded models
        birdnet_cfg.MODEL_PATH = str(chirpkit_model_dir / 'BirdNET_GLOBAL_6K_V2.4_Model_FP16.tflite')
        birdnet_cfg.LABELS_FILE = str(chirpkit_model_dir / 'BirdNET_GLOBAL_6K_V2.4_Labels.txt')
        print(f"✅ Using ChirpKit downloaded models from: {chirpkit_model_dir}")
    elif hasattr(birdnet_cfg, 'BIRDNET_MODEL_PATH'):
        # Fallback to GitHub version paths
        birdnet_cfg.MODEL_PATH = birdnet_cfg.BIRDNET_MODEL_PATH
        birdnet_cfg.LABELS_FILE = birdnet_cfg.BIRDNET_LABELS_FILE
        print("✅ Using BirdNET-Analyzer package models")
    else:
        raise RuntimeError(
            "BirdNET models not found. Please run:\n"
            "  from chirpkit.model_downloader import ModelDownloader\n"
            "  ModelDownloader.download_model('birdnet')"
        )

    # ... rest of config ...
    birdnet_model.load_model(class_output=False)

What Changed

  1. Priority 1: Check ChirpKit's downloaded models directory (~/.chirpkit/models/birdnet/)
  2. Priority 2: Fallback to BirdNET-Analyzer package paths (for development)
  3. Priority 3: Raise clear error if models not found

Testing

Before Fix

$ python -c "from src.chirpkit.transfer_learning.birdnet_embeddings import BirdNETEmbeddingExtractor; BirdNETEmbeddingExtractor()"
# Would fail looking for models in BirdNET-Analyzer package directory
ValueError: Could not open '/path/to/birdnet_analyzer/checkpoints/V2.4/BirdNET_GLOBAL_6K_V2.4_Model_FP32.tflite'

After Fix

$ python -c "from src.chirpkit.transfer_learning.birdnet_embeddings import BirdNETEmbeddingExtractor; BirdNETEmbeddingExtractor()"
✅ Using BirdNET-Analyzer (GitHub version with model files)
🔧 Initializing BirdNET embedding extractor...
✅ Using ChirpKit downloaded models from: /Users/user/.chirpkit/models/birdnet
📦 Loading BirdNET model from: /Users/user/.chirpkit/models/birdnet/BirdNET_GLOBAL_6K_V2.4_Model_FP16.tflite
✅ BirdNET embedding extractor ready!
   Embedding dim: 1024

Impact

Before

  • ❌ Downloaded models not used
  • ❌ BirdNET-Analyzer looks in wrong location
  • ❌ Fails with ValueError

After

  • ✅ Uses ChirpKit's downloaded models
  • ✅ Works with ModelDownloader workflow
  • ✅ Clear error messages if models missing

For SoundCurious

This fix ensures that after running:

from chirpkit.model_downloader import ModelDownloader
ModelDownloader.download_all_models()

The downloaded models in ~/.chirpkit/models/birdnet/ will be properly used by BirdNET-Analyzer.

Fixed: November 6, 2025 Status: ✅ COMPLETE - Tested and working