Le lundi 28 janvier 2008 à 22:25 -0600, Wade Nelson a écrit : > I know this is probably hardware-specific rather than ALSA-specific, but > I was hoping someone could point me in the right direction here... > > I have: > Guitar -> Behringer Xenyx mixer -> M-Audio Audiophile 2496 RCA inputs > > When the setup is sitting there, idle and active, there is a very very > high-pitched light squeal coming from the PC speakers. It's so > high-pitched that only myself and so far two other people I've had > listen can hear it. However, when I touch my hand to the guitar > strings, the squeal completely disappears. > > To me this sounds like a grounding issue, but I'm able to reproduce this > across several different guitars with different pickups & pickup > arrangements. > > Any ideas? ideas just for test: * Which hardware is grounded, which not? * try invert the socket position on the plug for ungrounded hw... * try putting a wire between the mass of hw and your ground...
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