TERKINSTEIN
Dark performance synth and four-track groovebox with 64 curated sounds, six-operator FM, metallic distortion, synthesized drum kits and pads, a reactive purple-and-green display, and 64-step tracks with four pattern banks.
by TerkWerX
Brick risk. Flashing this carries a known, documented risk of damaging the device.
- Distribution
- Prebuilt image you flash yourself
- License notes
- Credits and third-party terms are in LICENSING.md.
- Source
- github.com https://github.com/TerkWerX/FM1-TERKINSTEIN-Firmware
- Homepage
- terkinstein.com https://terkinstein.com/
- synth-engine
- sequencer
- drums
- fm
- distortion
- ui
- performance
Description
Derived from Dinghy with Felucca and SLOOP platform work. Tracks are drum, melody, atmosphere and bass, with live recording, held notes, an arpeggiator, a metronome and MIDI notes, wheels and pedals. The home screen animates in response to playing. The README calls 0.22.0-dev a development preview built and installed on one FM-1.
Install notes
Download the .fwsc from the releases page and install over USB (docs/INSTALL.md). Back up songs and settings first and keep the previous .fwsc; the FM-1's updater cannot read back the installed firmware. Hold OCT- at power-on for USB rescue.
Version history
| Version | Date | Notes |
|---|---|---|
| 0.22.0-dev | 2026-10-13 | Development preview; marked as a pre-release. |