Procedural Drum Synthesis & DSP Refinement#128
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- Added 15-bit LFSR and white noise generators to DrumUtils - Implemented diode damping (two-stage envelope) for TR-808 Kick - Enhanced TR-909 Kick with increased saturation and random noise offsets - Upgraded TR-909 Snare to use authentic LFSR noise - Added random start offsets to all noise-based drums to eliminate "machine-gun" effect - Implemented drum randomization logic and UI button with haptic feedback - Verified build and frontend behavior via Playwright Co-authored-by: Pitrat-wav <255843145+Pitrat-wav@users.noreply.github.com>
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| // Snappy Layer | ||
| const noiseSrc = new Tone.BufferSource(this.noiseBuffer); | ||
| // Start from random offset to avoid "machine-gun" effect | ||
| const randomStart = Math.random() * (this.noiseBuffer.duration * 0.5); |
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With the 909 snare using the default 0.5s LFSR buffer, this random offset leaves only 0.25–0.5s of source audio before the non-looping BufferSource reaches EOF. The snappy layer is scheduled for about 0.4s at the default snappy value and up to about 0.6s at high snappy, so offsets above ~0.1s cut the noise off before the envelope finishes, making otherwise identical snare hits randomly lose their tail. Constrain the offset to duration - scheduledLength, loop the buffer, or generate a longer LFSR buffer.
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This PR implements advanced procedural drum synthesis for a Telegram Mini App, strictly following the provided DSP research document. Key improvements include authentic 15-bit LFSR noise for 909 snares, diode-damping emulation for 808 kicks, and comprehensive micro-randomization (random noise offsets, phase randomization) to achieve an organic analog feel. A new randomization feature allows users to quickly generate musical Euclidean patterns.
PR created automatically by Jules for task 4928145360436010834 started by @Pitrat-wav