Do you remember if the textbook was orange (possibly with a two-tone cover design)? I had a really good textbook in college that had a... 4? CD set (with the big jewel case) that had a bunch of tracks and like you I really enjoyed it.
It was a reddish (could be orange, could have been maroon) color lightly mottled in black with a picture of a violin (or cello, idk) set in the lower 2/3 of the cover. I'm somewhat certain it had 6 cds because it filled my disc changer in my stereo, although that detail is fuzzy too.
