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PLEASE HELP! I can't turn off my internal microphone

Hi there,

I'm using Logic Pro to record some music using an external microphone hooked up to the microphone jack through my mixing board. But I keep getting feedback because the internal microphone simply won't shut off. Even if I put the volume all the way down in settings, it still won't turn off. If anyone could provide assistance in this issue, I'd greatly appreciate it.

Thank you!!

iMac 21.5, Mac OS X (10.6.2)

Posted on Jan 18, 2010 9:13 AM

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3 replies

Mar 8, 2010 12:40 PM in response to Pondini

We have a classroom that has odd acoustics that caused a severe feedback loop. We discovered that muting the speakers helped, but did not totally solve the problem. Now we want to try forcing the internal microphone input level to 0 so that we killing the issue from both ends. However...

I found that sliding the "Input volume" level to 0 in the Sound preference pane does not "mute" the mic. It actually still picks up sound. I even tried using the following command:

osascript -e 'tell application "System Events" to set volume input volume 0

This does make the slider visibly go all the way to the left, but again does not completely turn off the mic.

I tested this two ways: clapping my hands in front of the iMac and watching the Input level meter, and doing a voice recording in Garage Band.

Why the **** can't we turn off the mic?!?

PLEASE HELP! I can't turn off my internal microphone

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