Clef – spaced repetition for piano over MIDI
Clef is a piano practice app that puts real sheet music on screen, hears every note over MIDI, and re-tests each bar from memory with spaced repetition.
What it does
Clef hears every note over MIDI and re-tests each bar from memory right before you’d forget it. So what you learned last month is still under your fingers today. “I am shocked at how quickly I'll forget bits of a song that, just two weeks ago, I had finally worked up to performance level.” “After 3 weeks, I tried playing the old songs again but my fingers just didn't know which key to press.” “Almost 4 years in, and I can't play a whole song through if someone asks me to.” It isn’t your memory, and it isn’t your age. Forgetting actually happens on a predictable schedule, but most of us just don’t practice that way. No method to…from playclef.com
Does the same job
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I trained a 125M model to autocomplete piano on-device17d ago · simedw.com · ▲598I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.

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I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
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