FlexChords is an AI-powered tool that extracts guitar chords, musical key, and tempo from any YouTube video or uploaded audio and displays them in real time so users can play along. A neural network predicts chord labels that sync to playback as jumping chord cards while an interactive timeline shows timestamped chord blocks you can click to jump to a spot. It lets you transpose on the fly, auto-scrolls to keep active chords visible, and exports chord information as MIDI tracks for Logic/Ableton/Reaper or as timestamp labels for editors like Audacity. The interface targets musicians and producers who want immediate, playable chord charts tied to official videos, live performances, covers, or studio tracks.
The model claims 92% chord accuracy on songs it has never seen, measured using the MIREX evaluation standard, indicating strong generalization across genres and languages. Feature highlights include real-time prediction, key and tempo detection, DAW-ready MIDI export, and an interactive timeline for practice or arrangement work. The site demonstrates coverage with a diverse set of popular and recently added tracks, emphasizing practical use for learning, live play-along, and dropping chord tracks directly into production workflows.
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