01
Record & Mangle
Capture audio from your hardware input and granulate it as it comes in, or loop a phrase and let the engine chew on it. Freeze the grain cloud to hold a sound for as long as you want. Export captures as WAV to the Files app.
Catch a sound.Take it apart.
A granular instrument for iPad and iPhone.
Load a sound or record one live, then pull it apart into grains. Stretch and scatter it until it stops sounding like the source — or pitch it and play it like an instrument. Same engine as Grainsmith on the desktop; a new single-screen design, built to be played.
Status Public beta · iPad · iPhone · Standalone · AUv3
Works inAUM · Logic for iPad · other AUv3 hosts
PrivacyNo account · No subscription · No data collection
ControllersController setup →
DesktopGrainsmith →
↳ Four XY pads, live capture, one screenbuild 1.1.0
One screen, played by hand.
Live input, MIDI, or inside a host.
02
Instrument mode
Switch to Instrument mode and play the grain engine from a MIDI keyboard: four-voice polyphony, an attack/release envelope, and a root-note control. Works with hardware MIDI in the standalone app and with host MIDI in AUv3.
03
In your host
The AUv3 music effect loads in AUM, Logic for iPad, and other AUv3 hosts. Parameters are exposed for host automation and MIDI learn, and your patch is saved and restored with the session.
No account, no subscription, no data collection.
All processing is local. The rest of the box:
PresetsTen factory presets from the desktop Grainsmith library, plus save and recall for your own
BackgroundThe standalone keeps playing when you switch apps
EngineReverb, filter, grain-shape windows, pitch randomization
ExportCaptures save as WAV to the Files app
iPhoneRuns on iPhone with a compact layout
MIDI4-voice polyphonic Instrument mode, standalone and AUv3
Gathered in the field · worked at the forge
Then bring it to the bench.
Field and Grainsmith share one C++ granular engine. Export a capture as WAV and drop it into Grainsmith on the desktop: two layers, two spectral engines, a full modulation matrix, and the room around the sound.
OXI E16, Roto-Control, MIDI Fighter Twister.
Three controllers work out of the box after a one-time setup. Full CC assignments and a MIDI Fighter Twister config file are on the controller setup page.
Is this the same as the desktop Grainsmith?
No. Grainsmith Field is a separate product with a separate App Store listing and a separate price. It shares the same granular engine as the desktop plugin, but the UI, the interaction model, and the feature set are different — built specifically for touch and specifically for iOS. There is no automatic cross-buy between the App Store and our desktop store. The workflow is intentionally complementary: design on the desktop, perform on the device — or capture something live in the field and bring it into the desktop session.
Try it before it ships.
Grainsmith Field
Grainsmith Field is heading into public beta on TestFlight. It is a real instrument, but it is a beta: there are rough edges, and the feature set is not final. If you use iPad for music production, especially if you work in AUM, we would love your feedback.
Free during the beta · TestFlight · iOS 16 or later