Home › Forums › GuitarPCB Build Support › Sonic tonic issue (solved) › Reply To: Sonic tonic issue (solved) March 19, 2019 at 3:40 pm #4890 AnonymousInactive You’re welcome ! I have finished my pedal, but i would have your opinion. When I switch it on (or off), it crackle in my amp. Is it normal ? THanks !