formantwell · cepstral source-formants through an ordered biquad cascade

Reshape the vocal tract of your own recording — glassy to woody to vowel-like, continuously — at exactly-fixed pitch, through filters that cannot hiss.

The recording's own formants are discovered live with a real cepstrum, then morphed toward glassy, woody and vocal targets and rendered through five ordered peaking biquads — strictly spaced so they can never cross. The source plays at rate 1.0, so only the resonant body moves; the notes stay exactly put. Slide both hands left↔right to sweep the continuum, raise them to morph deeper, spread them to slide the vowel.