On Dec 1, 2010, at 11:58 PM, OzSanta wrote:

> G'day Tina
> 
> I'm using the built in mic.
> 
> However, even a usb mic won't drive the bars very high unless I talk about an 
> inch away from the mic, and even then, quite loudly.
> 
> I've trashed the Audio preferences, to no avail. I've lodged a hardware bug 
> report to Apple.
> 
> Line-in mics need a hi-gain mic such as the Belkin iMic, which I'm reluctant 
> to buy unless I  can figure out why the input is so low.
> 
> Anyone have a new iMac that's showing low input levels?



Try launching Audio MIDI Setup (it's in the Utilities Folder).  Select the 
appropriate input source and check the gain.  For my MacBook Pro my Built-in 
Mic shows a gain (Volume) of 7.00 dB for both channels 1 & 2.  Audio MIDI Setup 
is something of a second set of preferences for sound and  it often gets 
overlooked when there are problems.

Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting

"I'm a designated driver on the Information Super Highway"

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