Free
$0 forever
The whole synthesizer, plus a monthly allowance of AI patching.
30 AI requests / month
Download Agent SynthA modular music-making environment
Wire it your way.
Or let it patch itself.
Agent Synth builds sound, effects, mixing and arrangement out of the same modules and graphs — wire it however you work. Describe what you want and the AI patches, automates, or arranges it for you.
warm acid bassline with a slow filter sweep
Free to use, no account needed Works fully offline, forever Open-source engine macOS · Windows · Linux (experimental)
Your AI companion
You describe it. It builds, automates, arranges.
Agent Synth's AI reads your request and acts on it directly — building a patch graph, writing automation, or arranging tracks and clips on the timeline. Review the change, then keep working on it like you built it yourself.
- you
make a warm pad, add a slow filter sweep, put it on a new track
- agent synth
Built a five-node pad patch — wavetable into a low-pass filter with a slow LFO on cutoff, then reverb for width. Added a new track and an automation lane so the sweep plays back in time.
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The instrument
A full modular rack, patched by hand or by prompt.
Everything the AI can build, you can build — and edit afterwards. Drag a cable from any output to any input, attenuvert it, fan it out across poly voices, or across a whole timeline.
acid-bass.agentpatch
Every sound starts as a graph
Oscillators, filters, envelopes and cables — no fixed synth architecture standing between
you and the sound in your head.
Wavetables, samples, and FX
Warp modes, granular sampling, and a full effects chain from distortion to reverb —
patchable in any order.
A timeline on the same graph
Tracks, clips, and automation lanes sit on the same modular canvas — channel strips and a
master bus handle the mix.
Fold complexity into one knob
Group any patch into a macro with its own named, colored ports — collapse ten modules into
one control on the panel.
Runs anywhere you already work
A standalone app on macOS and Windows (Linux experimental), or a VST3/AU plugin inside your
existing DAW — same engine either way.
An AI that patches, automates, arranges
Describe what you want in plain language. Review the change it proposes, then apply it —
or keep iterating.
Modules in the box
- Oscillators
- Wavetable + warp modes
- Noise
- Sampler
- Filters
- Parametric EQ
- Poly voices
- MIDI in
- Envelopes
- LFOs
- Sequencer
- Macro bank
- Reverb
- Delay
- Distortion
- Chorus
- Phaser
- Compressor
- Flanger
- Limiter
- Pitch shifter
- Math / utility
- Timeline
- Tracks & clips
- Automation lanes
- Mixer
- Plugin (VST3/AU)
A typical starting point:
Sound gallery
What it sounds like.
Four patches, recorded dry. Recordings land here as the first release is cut.
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What it is
Built as one modular system, not a stack of tools.
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01
One modular engine
Sound, effects, mixing and arrangement are not separate tools bolted together. They are modules and graphs — the same building blocks, start to finish.
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02
Built to be shaped by you
Simple defaults get you playing in minutes. Full control is one cable away whenever you want to rewire how a sound, a mix, or a project works.
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03
An AI companion
Describe what you want and it patches, automates, or arranges — hosted or fully local, your call. Next: an assistant that can carry out any action in the app for you.
Pricing
The synth is free. The hosted AI has a meter.
Nothing happens to your synth. Every module, patch and preset keeps working offline, forever. Only new AI patch generations pause until your allowance resets.
Pro
Most capable$7 per month, or $60 a year
For people who patch by conversation all day.
500 AI requests / month
Get ProCheckout and billing are handled by Polar.
Use the same email you sign in to AgentSynth with, so Pro turns on automatically.
Hosted AI is in early access: it works today and gets better with every update.
Download
Builds for macOS, Windows and Linux.
Both builds exist. Code signing and notarization are in progress, so the installers are not on the site yet — the GitHub Releases page is the real path in the meantime.
- macOS Beta · v0.447.0
- Windows Beta · v0.447.0
- Linux Experimental — built in CI, not yet hand-tested Beta · v0.447.0