I I believe the converter is called a pre-amplifier.  External microphones work 
OK, but the signal is too small for the line-in to recognize it.  

Best wishes,

Jonathan

On Oct 28, 2011, at 12:57 PM, Brent Harding wrote:

> Wow, they've been doing this for a few years now. I wonder what the converter 
> thingy is?
> 
> ----- Original Message ----- From: "Alex Hall" <mehg...@gmail.com>
> To: "MacVisionaries list" <macvisionaries@googlegroups.com>
> Sent: Friday, October 28, 2011 11:27 AM
> Subject: a note on microphones for macs
> 
> 
>> Hi all,
>> I just made a discovery that I really wish someone had shared with me 
>> earlier.  Apparently, Macs use a different microphone input than most other 
>> PC sound cards.  This means that the standard, non line-quality microphone 
>> you may have, as I do, will not work with a Mac's microphone jack.  You 
>> either need a converter, a microphone that is certified to work with Macs, 
>> or a USB microphone.  This also explains why Windows sees only a line-in 
>> jack for audio input in addition to digital audio.
>> 
>> Have a great day,
>> Alex (msg sent from BrailleNote
>> mehg...@gmail.com; http://www.facebook.com/mehgcap
>> 
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