Build an editor for your old synthesizer with an agent
A musician had Claude Code build a full editor for a Yamaha Reface DX in under an hour, including a tool that sets every sound setting from a plain description.
Done with Claude Code
What they did
The poster asked Claude Code to build an editor for their Yamaha Reface DX keyboard synth. It put every editable setting on one screen. It lets them play and tweak sounds from another keyboard. It also added a generator that uses Claude to turn a plain-words sound description into settings.
How it went
The author says it took under an hour and brought the little synth back to life.
Try it yourself with Claude Code
Build a desktop or web editor for my [synth model] that talks to it over MIDI. First, find its MIDI documentation and list every editable setting with its control number, then show me the plan before coding. Put all settings on one screen with sliders and switches. Let me play notes from a second keyboard at [MIDI input]. Add a feature where I describe a sound in plain words and an AI model picks values for every setting. Test each setting on the real synth with me before calling it done.
Swap the highlighted [parts] for your own details.
Source: X · @Sameflat · Oct 18, 2026
Written with AI assistance from the original post and checked against our editorial guidelines. Results are as reported by the source, not independently verified. Spotted a mistake? Tell us.
