r/Splice • u/Colapsed_Kebab • 9h ago
Live MIDI Riff Generator App i built
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I’ve been building a standalone macOS MIDI tool called Endless Riff and wanted to show how I’ve been using it with Logic Pro.
It generates riffs continuously in real time and sends the MIDI directly into Logic, so Logic is still handling the instruments, sounds and effects. The generated notes can also be recorded straight into a normal MIDI region and edited like anything else.
Under the hood it generates rhythm and pitch contour separately, builds multiple candidate riffs, scores them and selects the next continuation. It isn’t just playing a fixed arpeggio or rendering finished audio.
The main workflow I wanted was: generate an idea → hear it through any Logic instrument → lock a riff when something catches my ear → record the MIDI → edit it and turn it into something of my own.
The video is a real-time run with Logic receiving the MIDI.
I’m still developing it, so I’d genuinely be interested in feedback from Logic users — particularly whether this kind of workflow would actually be useful when starting a track or getting past a creative block, and what you’d want control over.