This is an “ultrafast and lofi pitchshifter”,where the pitch of the audio is changed in realtime while the tempo is preserved.
“You can adjust the pitch in semitones (+/- 24 semitones) and with finetuning. Furthermore a delay line with feedback is included and the obligatory LP/HP filter with resonance!”
“Extra special feature: you can use MIDI note messages to pitch the audio in realtime up or down, relatively to a root key. Furthermore a randomizer, dry/wet and output adjustments enhance the fun.”