Chord Mini
Open source chord & beat detection application. Get your favorite songs transcribed!
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Chord Mini is an open-source app that detects chords, beats and synchronizes lyrics for uploaded songs.
- for
- Musicians, developers, and researchers needing automated music transcription.
- pricing
- open source
- license
- MIT
Key features
- AI chord detection — Detects chords using multiple deep-learning models with 301 chord labels.
- Beat-aligned grid — Shows real-time chord progression synced to audio with automatic time-signature detection.
- Roman numeral & key analysis — Provides Roman numeral analysis and key detection via Gemini AI.
- Lyrics synchronization — Displays synced lyrics (LRC files or AI-generated) alongside the music.
- Song segmentation overlay — Marks intro, verse, chorus, bridge and outro sections on the timeline.
- Piano visualizer & MIDI export — Shows falling-note visualizations for multiple instruments and allows MIDI export.
Use cases
- Transcribe chords and beats of a YouTube track for practice.
- Generate chord diagrams and Roman-numeral analysis for songwriting.
- Sync lyrics with audio for karaoke or educational apps.
- Create visual piano roll videos with multi-instrument support.
Chord Mini FAQ
Is Chord Mini free to use?+
Yes, it is an open-source project and can be used for free.
Can I host Chord Mini myself?+
Yes, the source code is on GitHub and can be self-hosted on your own server.
What input formats are supported?+
You can upload audio files directly, provide YouTube links, or search by keyword.
Does the backend run on GPU?+
The public backend runs on CPU; GPU acceleration is possible when self-hosting.
How are lyrics obtained?+
Lyrics can be supplied as LRC files or generated via the music.ai API using an LLM.
Summarized by DevHunt from chordmini.me · Sep 28, 2026. Details may change; check the official site.
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