Due to ad/da conversion in your rc20xl the signal is delayed by a small amount what leads to the phase issues you described.
I have noticed the same thing when pressing the bypass key on my lexicon mpx100. If bypassed, there is still ad/da conversion -> phase issues. Workaround in my case: instead of pressing bypass i turn the wet/dry knob (which works analog) from the wet to the dry side.
Maybe you can close the aux send or mute the return when the rc20xl is not in use.
Last edited by Blechi; 07-30-2008 at 09:13 AM.
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