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chicago acid house · A minor — blues inflections · 125 bpm · 4 bars · 2 tracks

phuture · acid territory

chicago 4×4 909 floor under a moog acid-bass riff in A minor. tape on for warmth, delay off — keep the 303 dry like the original.

reference · Phuture · Acid Tracks · 1987
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phuture · acid territory

125 bpm·4 bars·2 tracks·ref 1987

chicago 4×4 909 floor under a moog acid-bass riff in A minor. tape on for warmth, delay off — keep the 303 dry like the original.

● swap instruments · 2 tracks in this pattern▶
  • track 1 · 60 notes · default: TR-909
  • track 2 · 32 notes · default: Minimoog

swap a track's synth for your captured multisamples (e.g. minimoog → Moog Grandmother dubbass). preview to hear it through the real gear instead of the synthesis approximation.

the chain · toggle the signal path

chain order is fixed: drive → tape → delay → plate. matches nick's real signal flow.

what's happening
your midi is parsed in your browser. notes are routed through the selected synthesis engine (real circuit models, no samples). offline audio context renders the result. wav file lands in your downloads. nothing leaves your machine.
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multisample instruments — actual recordings of nick's Mother / Wurli / MS-20 / SP-1200 patches from la burbuja, plus FX chain modeling his real signal path (tape · drive · delay · plate) + room IRs (la burbuja · the spacepit).
the story · the technique · the why

the lesson of acid tracks isn't the 303 — it's that the 909 SITS STILL so the 303 can move. dj pierre's machine wasn't supposed to make this sound. it was broken, the previous owner tried to use it as a normal bass synth, the filter envelope was modulating wildly because the patch was wrong. they hit record anyway. that "wrong" is the whole genre.

the 909 floor here is the simplest possible thing: kick on every beat, snare on 2 and 4, closed hat on every 8th, open hat on the offbeat. patient. nothing fancy. that's the whole point — if your drums are also wandering, you've got two focal points fighting each other. pick one. let the other be the floor.

the moog acid-bass riff approximates what a 303 does: square wave fed into a fast filter envelope with high resonance, accent notes pushing the envelope sharper. the pattern walks root → root → octave → 5 → b7 → root → 3 → root. that walk is the canonical 303 acid figure — minor key, root anchor, octave punctuation, the b7 + 3 for tension.

tape on, delay off. the original was DRY. that filter squeal needs space to breathe — wet it up and you bury the character. if you want to push it harder, add drive AFTER the tape. that gives you the late-90s aphex / hardfloor acid territory.

the common mistake

people speed it up. acid sat at 125 because the floor needed time to swallow each kick. push past 130 and you lose the trance.

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