The system is Dell Dimension 4300 that has been upgraded to Windows XP. All updates have been installed, SP2, and DirectX. Sound Card is Avance Logic ALS4000, with current drivers installed. (I swapped with Soundblaster card but same distortion occurred). Searching for an answer, I checked the power supply. There is no indication of a problem, but I notice the fan is fluctuating (spinning, then slows down, and spins up again). This fluctuation in the fan doesn’t happen at the same time the music is distorted, but is the only answer I can come to. Is this a viable conclusion? Has anyone experienced this? Yes, the power supply will be replaced,the owner is contacting Dell to find out about warranty. My other concern is long term damage to mobo from the voltage supplied by PS. Thanks