So I'm having a problem with my sound and was wondering if anyone else has encountered this. My chain is: tuner-eq-dist-trem-reverb-amp. I get an out of tune E ringing through my amp. I checked all the pedals in the chain and when I add the reverb pedal (EH Holy Grail plus) is when the sound occurs. However, when I ran just guitar into the reverb into the amp, the sound disappears. Does anyone know why this may be? Also, I'm not really happy with this reverb pedal anyways, and was wondering if anyone had suggestions on what they like.