I was part of a small team at Apple that in 1995 led our first efforts in what we then called the "interactive music" industry and helped explain to musicians, labels and other stakeholders how this "thing called the Internet" was going to change the way the music industry operates forever. I'm also married to a touring musician signed to a major label, so please take it from me:

Absolutely, talk to *at least* 100 customers before building anything and I would advise you (and anyone doing customer development) to rarely talk to people you already work with. They are more likely to want to appease you by telling you what they think you want to hear.

Building products and services for the music industry is one of the most difficult ventures to embark upon. I don't mean to discourage you (there is lots of need for continued innovation) but there are more smart people who have ultimately failed in attempting to service this sector than almost any other area of web and mobile based endeavors!

Happy to talk to you both about the customer development process as well as provide you some feedback on your idea itself. Best of luck either way!