I've done the music thing - as a songwriter, not a performer. Submitting tapes to people to get feedback, being told the material had potential, and then the repeated rejection slips when you try and place the work with music publishers.
Just lke writing, in that respect I guess. I still play the demo tapes sometimes; bit like we dig out and read our 'old' scribblings and writings. Some of it was okay - some truly awful - but I still think there were some small gems in there! They just didn't know what they were missing. (Or maybe they did!)
Ah, well! Back to the book!!
John