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DRUMTHRASH_IMPORT_STATUS.md

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DrumThrash Acoustic Drums - Import Status

Summary

Status: Partial Import - Process Incomplete Date: 2025-11-15 Time: ~22 minutes of processing

Import Details

  • Collection: DrumThrash Acoustic Drums (3,728 samples expected)
  • Size: 1.8 GB total
  • Format: 24-bit / 48kHz WAV files
  • Mic Positions: 13 different microphone locations

Mic Position Breakdown

Position Expected Status
DT-Balcony 241 Queued
DT-Big 247 Queued
DT-CloseRoom 284 Queued
DT-Dry 292 Queued
DT-Hat 306 Queued
DT-KickIn 309 Queued
DT-KickOut 322 Queued
DT-Natural 246 Queued
DT-Overs 256 Queued
DT-SnareBot 319 Queued
DT-SnareTop 295 Queued
DT-T1 309 Queued
DT-T2 302 Queued
TOTAL 3,728 31 Imported

Processing Results

Database Status

  • Total Samples Before: 828
  • DrumThrash Imported: 31 samples
  • Total Samples After: 859 (net +31)
  • Database Growth: 7.2MB → 9.7MB (+2.5MB for 31 samples)

Analyzed Samples

  • Successfully Analyzed: 30 out of 31
  • Analysis Rate: 96.8% success on imported batch

Issue Identified

The batch import process started successfully but encountered issues after processing only the first batch:

  1. Audio warnings from librosa about very short audio files (< 1024 samples)
  2. Process hung after initial batch without clear error message
  3. No completion report was generated
  4. Only first batch was committed to database (batch size: 150)

Root Cause Analysis

DrumThrash Sample Characteristics

Many samples are very short drum hits with durations under 50ms:

  • Minimum duration examples: 10-20ms (hi-hat, click)
  • librosa FFT size (1024 samples @ 48kHz) = 21.3ms
  • These ultra-short samples trigger warnings and may cause issues with audio analysis

Import Strategy Issue

The hybrid analysis service attempts:

  1. Audio features extraction (librosa) - fails on very short samples
  2. AI vibe analysis (OpenRouter) - may timeout on batch

The process likely halted when encountering a large batch of short samples.

Recommended Solution

Option 1: Audio-Only Import (Recommended)

cd backend
python scripts/batch_import_samples.py \
  --directory "../samples/google_drive/drumthrash_acoustic" \
  --audio-only \
  --batch-size 200
  • Skips hybrid analysis (saves API costs)
  • Imports all 3,728 samples in ~30 minutes
  • Can analyze later in smaller batches

Option 2: Async Audio Analysis

# Import without analysis
python scripts/batch_import_samples.py \
  --directory "../samples/google_drive/drumthrash_acoustic" \
  --audio-only \
  --skip-analysis

# Analyze in parallel batches (low cost with Qwen3-7B)
python scripts/analyze_samples.py --limit 500

Option 3: Relaxed FFT Parameters

Modify AudioFeaturesService to handle short samples:

# Reduce FFT size for drum samples
n_fft = min(1024, int(len(y) * 2))

Next Steps

  1. Restart Import with audio-only option:

    • Estimated time: 40 minutes
    • All 3,728 samples to database
    • 0 API cost during import

  2. Analyze Later in controlled batches:

    • Small batches (50-100 samples)
    • Low-cost Qwen3-7B model
    • ~$0.037 total for all 3,728 samples

  3. Update Database with 31 completed analyses

Cost Impact

  • Current: 30 successful analyses = ~$0.0003 (at Qwen3-7B rates)
  • Total for full set: ~$0.037 with Qwen3-7B or $0.186 with Qwen3-235B
  • Savings: Separating import from analysis avoids timeout costs

Files Affected

  • /Users/bhunt/development/claude/personal/sp404mk2-sample-agent/samples/google_drive/drumthrash_acoustic/ - 3,728 files ready for import
  • /Users/bhunt/development/claude/personal/sp404mk2-sample-agent/backend/sp404_samples.db - Database with 31 imported samples

Action Required

Recommendation: Use Option 1 (Audio-Only Import) to get all 3,728 samples into the database quickly, then analyze them in smaller, more manageable batches.