// The build

Riff Lab listens to you play guitar and instantly writes it down. Play a riff through your mic or audio interface and it transcribes the notes, guitar tab, and rhythm in real time, detects the key, and teaches you one thing about it. Tuning-aware, works with acoustic or electric, and saves your ideas so you can pick them up later. A capture tool for songwriters who can play but can't read music. Fully client-side, no cloud.