I sometimes like to whistle while playing but noticed after a few seconds the VK starts to over process to the point of creating very loud distortion. I tried it with multiple presets and with Tone and Pitch turned off but had no luck.
I've also noticed higher frequencies seem to get cut with any hand percussion or other instruments in the mic. I often do this when routing the mic to my ditto looper. They come out with little gain and sounding dull. Is there a preset I could use for this or is this just a function of the VK being strictly for vocals?