kellogghk

Just noticed there're some annoying noise when I plug my helix to amp return(from left 1/4" mono). It appears when my helix's power on, even in a blank preset. Then I find two ways to solve it: 1. put a buffered pedal(a cheap boss pedal works fine)between the helix and amp. 2. use the right 1/4" output. Does anyone has this issue? If so how do you solve it? Is there any difference between left and right output when the signal is mono?

yes, only in the stomp mode.

In the actual sound! you may try to hold a chord with clean tone then switch on a drive pedal, it's easy to notice the delay

Before it worked just fine but I got this issue with the FW 2.20. There's no problem in snapshot mode but I don't get used to it. Is there anyway to restore the FW back to 2.12?