Speech Inversion Code

Reinstalled Windows 7.32-bit. The speech spectral inversion code you wrote earlier does not work.
error: unbound variable - TRACK
if continued: try evaluating symbol again
Function: #<FSubr-LET: #9b1a8f8>
((SIG (BANDPASS TRACK 50 7000)))
(MULT 3 (BANDPASS (MULT SIG (HZOSC 8000)) 50 7000))

I don’t know which code you are referring to, but from the error message, my guess is that in the Nyquist Prompt, “Use legacy (version 3) syntax” is enabled. Deselect that option. See: https://manual.audacityteam.org/man/nyquist_prompt.html