For the non-techie: This means that you can play a melody loop, and slow it down or speed it up, and the audio will remain in the same key! (No turntable RPM effect? Nope :)
So when is a beta release?? Don't hold your breath, sorry. There's still some work to be done before Luppp will be ready for prime-time, but until then feel free to test it if you're interested!
Will keep you posted, -Harry