ChordSonic

ChordSonic is a free, no-paywall audio chord finder — and a genuine Chordify alternative that works on any track you can upload, not just a database of already-charted songs. Drop an MP3 or WAV and ChordSonic hears the chord progression, the musical key, the tempo and the beat grid straight from the audio, and lays them on an interactive timeline you can play along with.

Unlike crowdsourced tab sites, it works on your own demos, live bootlegs, regional music with no fan transcriptions, and AI-generated tracks nobody else has heard.

What you can do with it:

• Get a full chord chart of any song with timing, and play along on the timeline
• See the key and tempo (BPM) and transpose the whole chart into any key or capo position
• Split a track into separate stems (drums, bass, guitar, piano, vocals, other) and download each one or a custom mix
• Remove vocals for an instrumental / karaoke track, or isolate vocals for an a-cappella
• Transcribe a melody or bassline to MIDI, or build a chord progression and export it
• Export the chord chart as TXT, CSV or JSON for your DAW, songbook or pipeline

How it's different: it analyses the audio, so coverage isn't limited to popular songs someone already transcribed. The chord timeline is never paywalled. And it exports machine-readable formats (JSON/CSV) that crowdsourced chart sites don't. Chord detection runs around 80–95% accuracy on clean pop/rock/singer-songwriter recordings.

Built for hobby guitarists, pianists and ukulele players learning songs by ear, producers reverse-engineering a reference track, and music teachers and students. Free to try with no signup; register to keep your analysis history.