My machine is an Intel P4 3.4 with an Intel 925 board, generally highly speced with the audio based on board its Realtec HD 7.1 system playing through a pro logic AV amp. Initially when setting this new machine up I had codec problems to get the audio playing through the appropriate channels - an upgrade to the full pack PowerDVD eventually resolved this. The problem now is with music audio - I am not definate but believe music audio was playing fine previously and I don't think anything has changed but now my music audio is stuttering badly the problem becomes much worse when carrying out another function on the machine such as browsing photos. DVD film audio is fine though. Any ideas.