Are you saying that the rate limiting factor is not the decoding done on-chip in the MAS device, but the speed at which the data is fed to it?
As best as I recall, when done by the 680X0 CPU the decoding was the rate limiting factor using up to 50+% of even an 060. But I'm no expert in this area.
The opinion I've gathered in recent times says that yes, in more peoples opinions than not, it's the parallel port speed that is the limiting factor. Mind you...I haven't done tests to confirm this.
That's why I'm thinking the IOBlix1200P (or for other miggies a similar device) would help.
I'm also beginning to think that maybe an MP3@64 would've been a better choice for me???