Squeak,
When the topic came up the last time, there was a post about turning off the noise gate and vocal compressor. If I recall correctly, this solved the problem for Uncle Dave. You'll find this on the mic settings page.
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)