asterisk users - Jan 2007 - MP3player distortion with Asterisk 1.4

I upgraded my Asterisk configuration to 1.4.0 yesterday, when I was adding a
TDM400P to have two PSTN connections to my analog phone lines.  Adding the
phone lines was a success, however, I now notice the MP3Player audio sounds
horrible (incomprehensible). The only changes that I have made to the
environment were the upgrade from 1.2 to 1.4.   Any thoughts?
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