[gobuntu] PulseAudio PCM channel broken

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http://ubuntuforums.org – I'm using XUbuntu Quantal, and have been fairly happy with it, until a couple of days ago. I was recording something off my USB tape deck (a Grace Digital Audio device, I'll figure out the numbers and such later), and had to force Audacity to get around something that prevented it from using the built-in USB sound card in the player. (I had to use the Line-In port on the motherboard) Unfortunately, somehow when I muted the Master volume control during recording, something "broke" somewhere in the PCM mixer. Right now, through the speakers, I can hear anything that comes in (Hardware)