Firmware risk: Unofficial firmware for the original OP-1 on TE firmware 246 only. Back up tapes and sounds first; flash the official 246 update to go back. Early community builds have left units stuck on an error screen at start-up.SourceSource
About
An SDK for writing new features for the original OP-1 (firmware R246) in C or assembly: synth engines, effects, step sequencers, chord keyboards, quantizers and screen overlays. You can test them in a bundled simulator before installing. It includes a one-command toolchain setup and recipes. The first release ships example engines (chiptune/bytebeat, tonewheel organ, a wavetable "warp" engine, a SID-style trio) and effects (a string resonator, a shimmer reverb and a multi-effect), and it's built so that packaged engines and effects can be shared.
