Exactly. The manual describes it this way:EvilDragon wrote: ↑Thu Jan 05, 2023 11:35 pmIt's offset in semitones I suppose.zerocrossing wrote: ↑Thu Jan 05, 2023 11:08 pmit also seems odd that the parameter seems to go from-142 to 142. What's 100% in that range? (RTFM later...) OK, I never would have guessed 60 from that UI
Cutoff
[-4.00 or +8.00...+136.00 or +138.00 semitones]
This controls the cutoff frequency of the filter, in semitones mapped to MIDI note numbers (60.00 = middle C). The frequency in Hz is also shown. The specific effect of the cutoff frequency will change depending on the selected Type, as described above. Most filter types have a range of -4.00 to +138.00, but the MS-20 LP/HP and Polysix range from +8.00 to +136.00.
and:
Key Track
[-142.00...+142.00]
This controls how much the Key Track will affect the Cutoff frequency. The value is the amount, in semitones, that the filter will change over five octaves of keyboard with a standard -1.00/+1.00 slope. The overall effect of the Keyboard Track is a combination of this value and the Keyboard Track shape.
With positive values (+), the effect will be in the direction specified by keyboard tracking; if the Slope goes up, the Cutoff will increase.
With negative values (–), the effect will be in the opposite direction; if the Slope goes up, the Cutoff will decrease.
To create one-octave-per-octave key tracking (useful when creating pitch through filter resonance):
1. Set the Key Track amount to +60.00 semitones.
2. In Filter Key Track, set Low and Low-Mid Slopes to -1.00, and Mid-High and High Slopes to +1.00.
