Grainsmith Field is 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.
It shares its granular engine with our desktop Grainsmith plugin, but it's rebuilt for touch. Field is a single multitouch screen: four XY pads control paired parameters (Density and Size, Jitter and Spread, Pitch and Reverse, Cutoff and Resonance), and a Morph control sweeps several at once.
THREE PLAYHEADS
Run up to three independent grain streams from one sample at the same time. Each head has its own position, speed, pitch, level, pan, grain size, and spread. Grab a playhead line on the waveform to move it independently, or move them as a group. Double-tap to gather them. Set a second head a fifth or an octave away and the streams blend into a single granular texture.
MODULATION
Six modulation slots drive the controls: LFOs and Euclidean patterns with per-route depth, assigned by long-pressing a knob. The MOVE dial sets the Morph macro itself in motion, and each destination drifts on its own phase. Rates sync to tempo, in the app or from the host clock.
RECORD AND 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. Scrub the waveform directly. Freeze the grain cloud to hold a sound for as long as you want. Run the stereo delay to smear the grain tails into echoes; it syncs to tempo too. Export captures as WAV to the Files app.
RECORD YOUR PERFORMANCE
Start a recording from the presets menu and everything you play is captured to a WAV file. Keep playing through app switches and screen locks; a Lock Screen Live Activity shows while recording runs. Recordings save to the Files app and share straight from Field.
PLAY IT AS AN INSTRUMENT
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. The pitch ribbon snaps to musical intervals: Free, Chromatic, Scale, Octaves, or Oct+5ths, with twelve scale options and a probability control. Works with hardware MIDI in the standalone app and with host MIDI in AUv3.
USE IT 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. Your patch saves and restores with the session, including head count, every per-head control, the modulation slots, and pitch snap mode.
ALSO IN THE BOX
- Ten factory presets grouped by character, with a browser and a Favorites section for your own
- Background audio: the standalone keeps playing when you switch apps
- Reverb, stereo delay with tempo sync, filter, grain-shape windows, pitch randomization
- Runs on iPhone with a compact layout
No account and no subscription. Field collects no data.
Developer quick response to support and fast fix! Excellent sound toy for experimental work.
Developer Response
Thanks for flagging this: you found a real bug. The playhead screen had no way to close it on some phones, so you were stuck force-quitting to get out. It is fixed in the update that's live now (version 1.3.2). Sorry for the hassle, and thanks for taking the time to report it.
Live mode: grains no longer jump when the record head passes the play position.
Recording into a live loop used to move any grain the record head was about to overwrite. You heard that as the cloud lurching backward and then forward again each time the head swept past. Now the buffer crossfades underneath instead, so the sound morphs from what was already in the loop to what you are recording, and grains stay where you put them.
Version 1.4.3
The developer, Plastic Factory LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
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Information
Seller
Plastic Factory LLC
Size
83.3 MB
Category
Music
Compatibility
Requires iOS 16.0 or later.
iPhone Requires iOS 16.0 or later.
iPad Requires iPadOS 16.0 or later.
Mac Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.