timbrefold · reshape the resonant body of your recording

Bend its timbre from glassy to woody to vowel-like — while the pitch and melody stay exactly the same.

A source-filter vocal tract of four peaking formants rides on Karel's piano. Raise your right hand to shrink and brighten the body, your left to tilt it dark or glassy, spread both hands to make it sing, and slide them left↔right to sweep the vowel — the recording's notes never move.