This file contains:
sketch\CylonVocoder\sdcard\SDCYLON.WAVsketch\CylonVocoder\CylonVocoder.inosketch\CylonVocoder\Vocoder.hSchematic.pdf
had a few issues with button on pin 9
its not obvious what version of easybutton lib #include <EasyButton.h> was actually used
on my teesny 4.1 the evert arias ver 2.0.3 did not work with pin 9 so i changed to what's used in teensy demo tut and used bounce lib and pin 0
and
yields unuseable out of range wetvol gain results
Excellent use of the very fast Teensy 4 series. As you say in the video, there is almost no latency.