About 30 years ago a friend of mine had an EP put out by The Temple City Kazoo Orchestra. Of the four tracks on it the only ones that were memorable enough to stick in my memory bank were "Stayin' Alive", with all the Bee Gees' harmonies replicated, and the opening section of "Also Sprach Zarathustra", with all the written instrumental parts replicated. The latter sounded absolutely fabulous played at half speed.

Best of luck with those CDs.

Cheers, Rowan