Pure waveform_view module (frame<->pixel markers, zero-crossing snap); per-zone loop/start overrides on PerformanceZone with self-versioning zone payload; core start-point read offset; editor waveform surface with drag machine.
REAPER-free and VST3-free voice engine with bounded stealing, ADSR envelope, key/velocity keymap resolution, and repitch from root note with loop-point sustain. Test target links neither SDK.