hello; i have a relatively new 15" powerbook, 1.5 ghz. i produce music and have my audio set up to go through an external soundcard, motu 828mkII. first, how do i get rid of that horrible screeching modem coming through my built-in speakers? it's ridiculous, i've tried looking everywhere. also, it seems my volume control for my "system output" (set to "built-in") is ususally greyed out and unusable unless a DVD is playing. of course this makes it impossible to simply MUTE the audio when my modem is screeching. any help appreciated!
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