Show HN: I trained a 125M model to autocomplete piano on-device
- ID
- 16159
- Status
- new
- Published
- 20 Aug 2026, 8:04 PM
- Fetched
- 22 Aug 2026, 8:51 PM
- Provider
- Hacker News
- Category
- dev-community
- Original URL
- https://simedw.com/2026/08/20/midi-autocomplete/
- Source URL
- https://hnrss.org/best
Excerpt
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. Comments URL: https://news.ycombinator.com/item?id=49373456 Points: 582 # Comments: 114
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