When going guitar - amp line out - podhd 400 - mixer
I get hum unless i connect the usb to my laptop. This is a problem because ii dont always have my laptop available. If i touch the end of the cable the hum reduces, but it is not eliminated unless i plug it in, so i suspect its related to grounding.
Amp alone = no hum
Pod alone = no hum
Amp + pod = hum
Amp + pod + pc via usb = no hum
Ive read a lot of posts about hum from connecting the usb, but my situation seems reversed..any thoughts? Anywhere else i can stick it to keep it quiet? :)
