Hey @Timbient, thanks for the project that did help and i can definitely reproduce what you are (painfully) hearing.
Based on the Documentation and the explanation of how n should work, a value of n8 would create a deviation of -/+ 8 semitones.
This means based on the root note F4 on your Midi Track 9:
- The lowest note should be:
B♭3 - The highest note should be
C5
Clearly this is not the case in your project at times - which sounds lovely btw 