I did the Acoustics and sound abatement for a recording studio here in Hollywood, called "Record Plant". The minute Studio SSL-3 was complete, Prince was the first to contract out the facility. Fifty or so of his people came prior to his arrival and decorated the studio with Purple silk everything and Purple furry rugs. I counted 27 instruments, from guitars, bass, percussion to keys.
He is dead sirius with every aspect in his creativity and was the only one in the room recording. I gained a lot of respect for his talent and professionalism.
Check out this "State of the Art" Studio
http://recordplant.com/