Image: ceceppa / Accordario · Accordario with song playback, chord grid and practice controls
Accordario turns songs into a local piano-practice workspace
The maker used Claude Opus to build a local practice tool with chord detection, section looping and Demucs instrument separation; complex songs can confuse its chord detection.
Credits
Earliest dated source: Details reviewed:
The full story
A piano learner wanted to identify chords in a YouTube song, loop difficult passages and remove the piano part to play along. They built Accordario with Claude Opus and now use it for personal practice.
The application runs locally without an account, combining chord detection with Demucs instrument separation. The maker shares the source and notes that chord detection can struggle with more complex songs.
Before and after
- Starting problem
- A need to loop passages, identify chords and practise with the piano removed.
- Reported result
- A tool the maker uses locally, with chord-detection limitations.
Device and compatibility
- Local desktop application; supported operating systems not statedSource ↗
What Claude did
- Implementation of a piano-practice toolClaude · Opus Source ↗
How it was done
Tools
Themes
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Sources
From a short post by the maker, so the details are as they tell them.
- Reddit: I built a small tool to help me practise songs on piano
The maker's post describing the project and reported limitations.
- The code: github.comRepository account: ceceppa
Linked in the post.