Just to add a counterpoint, I had a lot of trouble making the connection. I wasn't sure how github would map to "guitar and bass players".

Is it sharing instruments used on recordings? Is it sharing what equipment you have? Is it sharing settings (yes!)? Is it sharing sound clips (yes!)? Is it some other really smart way to do something similar to GitHub using musical instruments that I haven't thought of?

Honestly, mentioning GitHub here seems like more a publicity move than a useful comparison.