Audio doesn't play back through DAE audio tracks

I work on Digidesign HD hardware and Logic as a front end and a problem has crept in over the last week or so.
I will be working on a song and suddenly with no warning Logic freezes for about 30sec or so. After this all audio files playing back on DAE tracks will not playback or white noise plays back from those track. The DTDM tracks and instruments tracks work fine. This happens wether i have a couple of tracks on the go or loads. It's like the DAE audio playback side crashes but all other things still play back through the DAE so it half works.
PLEASE PLEASE help as i have to reboot Logic everytime and 10-20 mins later it happens all over again.
Thanx
G5 dual 2Gh   Mac OS X (10.4.2)  

Just some quick thoughts....I'm not a "techie", but have had my share of softwaretrouble!!
It could be that Logic is set to global 16bit - and you try to play back 24bit files. Had kind of same problem a year ago, but don't remember if it was Logic OR ProTools that gave this result (played for a while...then a burst of white noise). But the crash...no. This is probably caused by other components. It's usually a good thing to trash the Logic preference file and restart. Then check preferences>audio>drivers>DAE that the global bitrate is set as desired (according to your already recorded files). The DAE preferences don't contain that much information, but could be helpful to trash too. Just remember to set the playback buffersize to a reasonable amount for your setup.
Hope this will help.
G5 Dual 1.8 / 3GB RAM   Mac OS X (10.4.6)   Logic Pro 7.2/ProTools 7.1 HD2 Accel/192 IO

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