OK Derek, I was under the impression that you were referring to a KN7000...........

I've had a look at the KN2600 User Manual and I think you may be able to change some settings, even though you don't have the DSP button on your KN2600. Have a look at Page 42 of your manual and try editing the 'Standard Rotary' effect..............
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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)