You’re possibly in pass thru mode in pot mode,
You can change it in global
2 . Pot Mode: Rel, Pas, Jup (Relative, Passthru, Jump)—The rotary controls on the front panel are a mixture of “endless” rotary encoders and potenti- ometers or “pots.” The pots are identifiable by their lined knobs and the fact that they have about 300° of travel. There are three pot modes to deter- mine how the synth reacts when the programmable parameters are edited. (Master volume is not programmable, so these modes don’t apply.)
In Relative mode, changes are relative to the stored setting. In Relative mode, the full value range is not available until either the minimum or maximum value and the respective lower or upper limit of the pot’s travel is reached. For example, the resonance parameter has an internal value range of 0 to 127. Let’s say the physical position of the resonance pot is the equivalent to a
Prophet-6 Operation Manual Global Settings 13
value of 100. If you switch to a program that has a stored Resonance setting of 63 and turn the pot all the way up, it will only go to 90. To get to the maximum value of 127, you first have to turn down until the value is at the other extreme and the pot is at the limit of its travel (in this case, 0 and fully counter-clockwise, respectively).
In Passthru mode, turning the pot has no effect until after the edited value equals the preset value (that is, until the edited value “passes through” the stored value).
Jump mode uses an absolute value based upon the position of the pot when edited: turn a pot and the value jumps immediately from the stored value to the edited value.