Granted your probably not supposed to run a keyboard through a guitar amp but I've been trying to record some stuff I don't really know how to describe the sound I'm after, I want to add some like texture to one of my songs, so I've trying to do this dronish fairly bass heavy church organ type sound, with some minor flanger effects on it to give it a bit of echo. It's more like a really bass heavy humming type sound I'm after, basically I'm using my sustain pedal and just layering a few chords together, most of the time the sound comes through fine, every so often though the amp will give an involuntary high pitched squeal almost like feedback.
The amp I'm using is a cheap peice of shit, it's never given me any trouble with my guitar and I quite like the tone I get out of it, but when I play lower bass notes on the keyboard the amp will make this high pitched squeaking noise, doesn't always do it only sometimes, is this normal, am not supposed to run my keyboard through a guitar amp, will it do the same thing if I borrow a more expensive amp from a friend?