From a quick read of the code, it seems like all this does is shift pitch; it doesn't change resonance or anything else that affects how your voice sounds. So it's great for sounding like a chipmunk or a demon, but not that useful for sounding like a different person.
Looks like it uses libsox internally. You can also use command-line SoX utilities to get the same effect. For example, this plays your microphone back at you, pitch shifted and with a delay:
play '|rec -p pitch +400 40 delay 5 5'
(To be clear, I don't mean to beat down anybody's pet project. Just spreading related information. There's very little accessible documentation of Linux audio stuff.)
Looks like it uses libsox internally. You can also use command-line SoX utilities to get the same effect. For example, this plays your microphone back at you, pitch shifted and with a delay:
(To be clear, I don't mean to beat down anybody's pet project. Just spreading related information. There's very little accessible documentation of Linux audio stuff.)