Chord AI
On-device deep learning chord, beat, and key recognition for musicians.
About
Chord AI is a mobile app by Nomad AI and Bellec Research that uses deep learning to recognize chords, beats, and keys from any song in real time. Users can analyze audio from the microphone, local files, YouTube, or SoundCloud, and get chord charts with guitar, piano, and ukulele diagrams, plus tempo and bar segmentation from beat tracking.
The app runs its models on-device for privacy, recognizes advanced voicings including sevenths and altered dominants, and the Pro tier adds 4-stem instrument separation, audio-to-MIDI conversion via Spotify's Basic Pitch, and lyrics transcription via OpenAI's Whisper. It has over 500,000 users with a 4.7+ app store rating; the base app is free, with Pro around $9 per month or $69 per year.
What it can do
- Real-time on-device chord recognition
- Beat, tempo, and key detection
- Chord diagrams for guitar, piano, ukulele
- 4-stem separation and audio-to-MIDI (Pro)
- Lyrics transcription via Whisper (Pro)
Setup
Download Chord AI free on iOS or Android, grant microphone permission or load a track, and get instant chord charts.
Prerequisites
A smartphone; audio from mic, files, YouTube, or SoundCloud.
Use cases
Works with
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 124; Trending score 76/100 from researcher assessment.
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.