Four decks, a 4-channel DJ mixer and a 16-pad MIDI sampler. Every sample you hear
is computed by dsp.wasm, compiled from PARENA (stdlib/mixforge/mixer.prn +
sampler.prn). Browsers need a click before they will play sound.
Pads answer MIDI notes 36–51 (C2–D#3, any channel) — or the keys 1234 QWER ASDF ZXCV. Notes outside the pad bank play the chromatic pad (outlined) pitched in exact 12-TET from its root; the pitch wheel bends it ±2 semitones. CC on MIDI channels 1–4 drive decks 1–4: CC7 fader, CC10 pan, CC74 filter, CC1 pitch, CC2 trim, CC8 crossfader.