01
Pitch Shift
granular delay-line · F0 moves, duration & words stay WHO
OFF
OUT
Processing chain signal flows top → bottom
A/B
02
Formant Shift
spectral-envelope warp · vocal-tract scale, F1–F3 move WHO
OFF
OUT
03
Band Limit
carves toward telephone band · strips consonant air & speaker detail WHOWHAT
OFF
OUT
04
Noise Vocoder
keeps band envelopes, replaces fine structure with noise · the WHO↔WHAT dial WHATWHO
OFF
OUT
05
Spectral Scramble
permutes log-spaced frequency segments · phonetic mapping breaks, rhythm remains WHAT
OFF
OUT
chain order
01 pitch → 02 formant →
03 band → 04 vocoder →
05 scramble
· all stages in one 2048-pt FFT worklet, 75% overlap