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C:\ACID.YOS\README.TXT

Free online drum machine

ACID.YOS is the drum machine and music studio by Acid.archive. It runs in the browser, it's free, and you don't need an account: open it, press Play, and start programming your beat.
▶ Open ACID.YOSFrequently asked questions
funciones.txtwhat you can do

What you can do with ACID.YOS

  • Step sequencer

    Program drums on a 16-step grid per bar, with 1, 2, 4, or 8-bar loops, swing, probability, and ratchets per step.

  • 10 classic drum machines

    Sounds from machines like the Roland TR-808, Roland CR-8000, LinnDrum LM-2, Casio RZ-1, or Casio SK-1, plus breaks ready to chop.

  • 71 instruments

    Pianos, guitars, strings, basses, synths, vocals, and world sounds. Add up to 8 instrument tracks, each with its own notes, volume, and effects.

  • Piano roll and keyboard

    Draw melodies and chords note by note, or play them using the on-screen keyboard, your computer keyboard, or a MIDI keyboard, and record what you play.

  • Patterns and Song

    Four patterns (A–D) to vary the beat and a Song mode to chain them in order.

  • Mixer with effects

    Volume, pan, mute, and solo per track; filters, saturation, compression, delay, and reverb per track, for the full drum kit, and on the master.

  • Sampler and custom audio

    Import your own sounds or chop a break, and place audio on a timeline alongside the rest of the song.

  • Music with code

    Code Lab to make music by writing code with Glicol, and Patch Lab, a little patch-cable modular synth.

  • Export to WAV and MIDI

    Download your mix in WAV, notes in MIDI to continue in your music software, or the entire project to reopen another day.

primer-beat.txtin 4 steps

Your first beat in four steps

  1. Open ACID.YOS and press Play. If you're on iPhone, turn off silent mode first.
  2. Tap the sequencer cells to place kick, snare, and hi-hat on the steps you want.
  3. Add an instrument track (for example a bass or a piano) and draw some notes in the piano roll.
  4. Adjust tempo and effects in the mixer and export your beat to WAV or MIDI.

Frequently asked questions

Is it free?

Yes. ACID.YOS is free and has no ads. You can use it without an account; a free account is only needed to save your projects to the cloud.

Do I need to install anything?

No. It runs in the browser, on desktop, tablet, and mobile. Sounds are loaded from the internet the first time you use them.

Can I use it on mobile?

Yes, the interface adapts to touchscreens. On iPhone, if you can't hear anything, turn off silent mode: Safari won't play web audio with the mute switch on.

Can I export my beat?

Yes. You can download the mix as WAV, notes as MIDI, or the entire project as a file. The WAV sounds exactly like what you hear in the studio.

Can I use it with a MIDI keyboard?

Yes, in Web MIDI-compatible browsers (like Chrome or Edge) the notes you play go to the selected track. You can also play with your computer keys.

What music styles can I make?

Anything based on loops and patterns: hip hop, house, techno, jungle, drum and bass, electro, or lo-fi. There are style packs that choose sounds and effects to get you started quickly.

Are my projects saved?

They are saved automatically in your browser. With a free account you can also save them to the cloud and open them on another device.

ACID.YOS is handmade by Acid on top of open source software. View credits and licenses.