In a regular K2500 program, on the other hand, voices only start when you play a note. You'll see that a number of the K2500's voices are active, even when no notes are being played. This parameter lets you specify the number of tone wheels used by a KB3 program. The classic tone wheel organs used 91 tone wheels, though the lowest 12 were for the pedals only. Therefore, you may find 79 a good number of tone wheels to specify for realistic organ emulations.
Key click uses on additional voice.
This would leave you eight voices for other programs. You can specify up to 95 tone wheels. Of course, you can edit the programs to lower the number of tone wheels and thereby increase your leftover polyphony. The lower the number of tonewheels, the sooner it wraps. KB3 programs can only be played on a single MIDI Channel.