What is the Acid House Maker?

A free online acid house sequencer from ButtonBass. It pairs a 303-style bass synthesizer — with accent, slide and a screaming resonant filter — with a 909-style drum machine. Every sound is synthesized live in your browser with the Web Audio API, so there is nothing to install.

Is the Acid House Maker really free?

Yes. It is completely free with no download, no account and no time limit.

What BPM is acid house music?

Classic acid house usually sits between about 118 and 135 BPM. The tempo knob here goes from 100 to 150 BPM and starts at 130.

What makes the acid squelch sound?

A bass oscillator pushed through a resonant low-pass filter. Turn Resonance up high and sweep Cutoff while the pattern loops, then add accent steps for bark and slide steps to glide between notes — the two tricks behind every classic acid record.

Can I download the music I make?

Yes. Export WAV renders your whole arrangement to a WAV file, and the Rec button captures a live knob-twisting performance as an audio file. Everything is generated on your device, so your tracks are yours to use.

Can I share the acid tracks I make?

Yes — Share Mix packs your entire song into a short link that restores it exactly on any device, and you can submit it to the ButtonBass Community Mixes gallery for others to hear and vote on.

Does it work on phones and tablets?

Yes — it is built for touch, with swipe-to-paint grids and a step editor, and runs in any modern browser on phones, tablets, Chromebooks and desktops.

Acid House Maker

303-style bass line · 909-style drums · all synthesized live in your browser

Rec

Tempo

Swing

Master

Drums

Pump

BASS LINE

Computer controlled · AH-3O3

Waveform

Cutoff

Resonance

Env Mod

Decay

Accent

Drive

Echo

Sweep

Volume

BASS SEQUENCER

Steps 1–8

Tap a cell, or drag horizontally across a row to paint or erase. Long-press any bass cell to edit the whole step.

DRUM MACHINE

Steps 1–8

Tap a cell, or drag horizontally across a drum row to paint or erase.

FULL SONG GENERATOR Creates four related patterns and arranges them into a unique 16-bar acid track.

PATTERNS + SONG

CHAIN

Make acid house online, free

This acid house maker puts a fully synthesized 303-style bass line and a 909-style drum machine in your browser. Nothing is sampled: the bass is a live sawtooth or square oscillator squeezed through a screaming resonant filter, and every kick, snare, clap and hat is generated with the Web Audio API the moment you hit play.

How to get that acid squelch

Draw a bass line in the grid, then turn Resonance up past 3 o'clock and sweep Cutoff while the pattern loops. Add Accent steps to make notes bark, and Slide steps to glide one note into the next without retriggering, the two tricks that define every classic acid record. Low Decay gives you tight rubbery plucks; high Env Mod makes the filter yelp. Push Drive for warehouse-grade distortion.

Stuck? Hit Randomize Acid for a brand-new line, or Mutate to nudge the one you have, one happy accident at a time. The Sweep knob rides the filter over eight bars by itself, the Rec button captures a live knob-twisting performance straight to WAV, and Daily Acid serves everyone in the world the same fresh seeded pattern each day. Made something nasty? Share Link packs your entire song into a URL you can send to anyone.

Turn up Echo for a tempo-synced ping-pong delay and Pump to sidechain the bass to the kick. Build a full track by sketching variations into pattern slots A–D, chaining them into a song, and exporting the whole arrangement as a WAV for your DAW, or stack your exports with loops from the Phonk Maker and the Beat Maker.

How to make an acid house track

Press play. A classic starter groove is already loaded — you'll hear a full acid loop instantly.
Draw a bass line. Click notes into the bass sequencer grid. Every note is locked to the scale, so anything you place fits the track.
Add accent and slide. Mark steps in the Accent row to make notes bark, and in the Slide row to glide notes together — that's the acid signature.
Tweak the filter live. Turn Resonance up high and ride the Cutoff knob while the loop plays. Push Drive for grit and Echo for space.
Build the song and share it. Hit Generate New Song for a four-pattern arrangement, Export WAV to download it, or Share Mix to get a link and post it to the Community Mixes gallery.

Acid House Maker FAQ

What is the Acid House Maker?: A free online acid house sequencer from ButtonBass. It pairs a 303-style bass synthesizer — with accent, slide and a screaming resonant filter — with a 909-style drum machine. Every sound is synthesized live in your browser with the Web Audio API, so there is nothing to install.
Is the Acid House Maker really free?: Yes. It is completely free with no download, no account and no time limit.
What BPM is acid house music?: Classic acid house usually sits between about 118 and 135 BPM. The tempo knob here goes from 100 to 150 BPM and starts at 130.
What makes the acid squelch sound?: A bass oscillator pushed through a resonant low-pass filter. Turn Resonance up high and sweep Cutoff while the pattern loops, then add accent steps for bark and slide steps to glide between notes — the two tricks behind every classic acid record.
Can I download the music I make?: Yes. Export WAV renders your whole arrangement to a WAV file, and the Rec button captures a live knob-twisting performance as an audio file. Everything is generated on your device, so your tracks are yours to use.
Can I share the acid tracks I make?: Yes — Share Mix packs your entire song into a short link that restores it exactly on any device, and you can submit it to the ButtonBass Community Mixes gallery for others to hear and vote on.
Does it work on phones and tablets?: Yes — it is built for touch, with swipe-to-paint grids and a step editor, and runs in any modern browser on phones, tablets, Chromebooks and desktops. Want more browser instruments? Try the Trap Maker or the 8-Bit Beat Maker next.