Hello. we have rather strange issue with the sound quality of our custom recordings (used in ivr's). the files were uploaded as mp3 through freepbx, sometimes and only sometimes the recordings change their pitch to very slow or very high voice. most of the times the recordings (through the ivr's..) are ok. the hardware is ok and not overloaded (HP DL 360 G4 dual proc.) any ideas where to start the investigation? thanks. Tomer.