Miditui – A terminal app/UI for MIDI composing, mixing, and playback

In plain words

Miditui is a terminal-based application for MIDI composition, mixing, and playback. It allows musicians and developers to work with MIDI directly from the command line, offering tools for creating musical sequences, adjusting mix levels, and playing back compositions. The software is designed for users who prefer terminal interfaces or need to integrate MIDI workflows into command-line environments. The source code is available on GitHub.

written from the facts on this page · September 2026

From the sources

An interactive terminal app/UI for MIDI composing, mixing, and playback—written in Rust. Disclosure: This crate was developed with the assistance of Claude Opus 4.5 , initially as a personal experiment just to see how well modern coding agents can handle TUIs and I figured a full-on MIDI mixer which has atypical UI requirements would be a more interesting test. Opus 4.5 did a good job and after a demo went viral on X people were asking for me to release it, so I decided to spend extra time polishing and comprehensively testing the app before then open-sourcing it. I have written a full analysis of the agentic coding workflow—including the prompts provided to Opus 4.5—in the agent_notes…from github.com

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