Have a bit of an issue which I'm puzzled about.
If I plugin a guitar to top left input, hi input channel 1, and link low ch1 to hi ch2, I can hear a sort of phasing sound and when turning up volume I get squeals.
If I use the link to ch1 to ch2 from low ch1 to low ch1 I dont get squeals and I dont hear the phasing?
Could anyone explain this please and what I need to do to fix this please?