asterisk users - Aug 2006 - Clipped audio at beginning of SIP calls.

Hey,

I have ALWAYS seen the first couple of seconds of audio being clipped  
in my SIP calls.  An easy way to see this is to call the echo test.   
I don't hear the beginning of the playback.

I tried installing a wait in front of the playback, but it didn't  
affect the clipped audio.

This clipping seems to occur for all of my SIP devices (ATA's and  
softphones).

My IAX devices don't have this issue.

Any ideas in why this occurs and how to fix and/or minimize it?

Asterisk 1.2.10 running on OSX 10.4.7

Marty