On the input side? Absolutely! That 2.2M/330nF combo is a really low value highpass filter to keep any DC adjustment transients from a level mismatch out of the

On the input side? Absolutely! That 2.2M/330nF combo is a really low value highpass filter to keep any DC adjustment transients from a level mismatch out of the audio chain, which would result in one of those nasty loud "pops" you hear when you unplug a circuit. It's also serving to set the DC bias point of the input transistor without loading it down from the 2.2M pulldown.