🔊 Live Instant A/B Audition Engine (Listen Directly)
Click Play, then toggle between Legacy Demucs Stem and Restored Punchy Master in real-time mid-groove to immediately hear the restored acoustic kick punch and snare crack body.
📊 Spectral Energy Heatmaps (Log-Frequency Spectrograms)
FFmpeg high-resolution log-frequency spectrograms ($0\text{ Hz}$ to $12\text{ kHz}$) across the 30-second worship groove ($02:50–03:20$).
Notice the complete black void below $500\text{ Hz}$. Kick ($50–100\text{ Hz}$) and Snare Fundamental ($180–320\text{ Hz}$) are completely missing. Only high-frequency cymbal lines ($>3.5\text{ kHz}$) exist.
Notice the vibrant dense acoustic heat across the sub-bass kick ($60–100\text{ Hz}$) and the explosive snare body ($180–320\text{ Hz}$) dynamically keyed to John's stick strikes, with calibrated high-shelf tame on harsh cymbals.
🌊 Waveform Dynamics & Crest Factor
📈 Empirical Audio Analysis & Frequency Verification Gate
Rigorous calibrated FFmpeg volumedetect and astats across all four church worship songs on October 18, 2026.
| Song Section | Kick Band (<120Hz) | Snare Body (160–320Hz) | Hi-Hat (>3.5kHz) | Mean RMS | Max Peak |
|---|---|---|---|---|---|
| Song 1 (00:10–05:09) Opening Worship Medley |
-25.3 dBFS (+19.2 dB) | -25.8 dBFS (+30.5 dB) | -32.1 dBFS (-4.0 dB tame) | -19.7 dBFS | -0.2 dBFS |
| Song 2 (05:30–09:33) Uptempo Groove |
-24.1 dBFS (+20.4 dB) | -24.7 dBFS (+31.6 dB) | -30.8 dBFS | -18.4 dBFS | 0.0 dBFS |
| Song 3 (10:12–13:35) Contemplative Ballad |
-26.5 dBFS (+18.0 dB) | -26.9 dBFS (+29.4 dB) | -33.4 dBFS | -20.4 dBFS | 0.0 dBFS |
| Song 4 (13:51–18:00) Climax & Service Outro |
-24.8 dBFS (+19.7 dB) | -25.2 dBFS (+31.1 dB) | -31.2 dBFS | -18.9 dBFS | 0.0 dBFS |