Research-Based Drum Synthesis & DSP Refinement

[Pitrat-wav]

This PR implements high-fidelity procedural drum synthesis based on the provided DSP analysis of TR-808 and TR-909 circuits. Key features include:

• Velocity Sensitivity: All drum triggers now scale their initial gain based on the incoming velocity.
• Analog Drift: Per-trigger micro-randomization of oscillator phase, pitch drift (+/- 0.5-1Hz), filter cutoff (+/- 2%), and envelope decay (+/- 2%) to avoid the "machine gun" effect.
• Master Bus Processing: Implemented a master saturation curve (soft-clipping tanh) and compressor in the DrumMachine to provide the characteristic analog "glue".
• Enhanced Models: Fixed specific DSP ratios (e.g., 2.5x pitch sweep for 808 Kick, 4.7x for 909 Kick) and added high-pass filters to noise components to prevent phase traps.
• Immediate Experience: Updated default Euclidean patterns to provide a rhythmic "drum party" on initial load.

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PR created automatically by Jules for task 16260907016075525936 started by @Pitrat-wav

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