the only way i see that computer sending a pcm signal to the receiver from music file or vob file (dvd) is having a software program which while the stream is playing reencoding it then streaming that through the 1394 making sure it was encoding it as a pcm and i'm not sure if that data the pioneer is intended to receive has to be encapsulated some how seperate from just a pcm, i haven't studied the issue much but looks interesting. as far i know i think all those electronics people have agreed to some standard on the data transmission through 1394, at least i hope so.