Currently, if I need to create a specific preset that plays one octave lower, I use the "Tuning (semi-tones)" and set it to "-12". It works but the sound is not great, probably because Polyphone is processing the audio. Instead, how can I tell Polyphone to shift one octave low (no mess with the sound, just play any note as if it was 12 notes lower). Is there an option to do this?