A rare electronic instrument and a work of art
An app created with a stroke of genius. It functions both as an instrument for creating experimental music and as a sound art piece.
$3.99
About
This experimental synthesizer uses your iPhone's magnetic sensor to capture ambient electromagnetic waves and transform them into sound. Explore unique soundscapes by "playing" the electromagnetic noise from everyday electronics like power adapters and Wi-Fi routers.
✓Electromagnetic wave to sound conversion
✓Multi-layered sound engine
✓Sensor-linked synth voices
✓Camera-driven tremolo effect
✓Bitcrush, comb filter, reverb, stutter effects
✓Ableton Link tempo synchronization
✓3D point cloud frequency spectrum visualization
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What's New in GRAB EM Field Synth
1.0.5
September 13, 2026
• Rebuilt the SPECTRUM display. It is now a proper log-frequency analyzer that no longer pins to full scale when you lean on the effects, and it draws as a waveform-style line instead of bars. • STUTTER now snaps to musical subdivisions, with a beat ladder from 1/4 to 1/64 (triplets included) shown right on the fader. • Ableton Link is now follow-only. GRAB syncs to the session tempo and never changes it for the other apps. • The Ableton LINK button now uses the same ○ / ● markers as CAM.
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FAQ
What is GRAB?
GRAB is an experimental synthesizer for iPhone that uses the device's magnetic sensor to capture ambient electromagnetic waves and convert them into sound. It allows users to create music from the electromagnetic noise of everyday electronics.
How does GRAB work?
GRAB utilizes your iPhone's magnetic sensor to detect electromagnetic fields from nearby devices like power adapters and Wi-Fi routers. These detected fields are then processed and translated into audible sound through its unique sound engine.
What kind of sounds can GRAB create?
GRAB offers a multi-layered sound engine with five 'ETHER' inspired layers and three sensor-linked synth voices (sawtooth, square, noise). It also includes effects like bitcrush, comb filter, reverb, and stutter for further sound manipulation.
Can GRAB sync with other music software?
Yes, GRAB supports Ableton Link for automatic tempo synchronization with DAWs like Ableton Live, Logic, and other iOS music applications. The stutter effect can also sync to the Link BPM.
Is GRAB suitable for live performances?
GRAB can be used as an atmospheric sound effect generator for live sessions or as an experimental platform for noise music. Its ability to sync with other devices via Ableton Link makes it a versatile tool for live setups.
What are the visual features of GRAB?
GRAB features a 3D point cloud frequency spectrum visualization. When the camera is on, it can also display a grayscale video feed that is integrated with the spectrum for a unique visual experience.
Does GRAB have ads?
No, GRAB does not contain advertisements. As a paid application, it offers an uninterrupted user experience without any ad interruptions.
What is the price of GRAB?
GRAB is available for a one-time purchase of $3.99. This price grants you full access to all features and functionalities of the application.
