For those who don't know Phil Burk is a computer music pioneer, and HMSL is a pioneering computer music system. This pay-to-play nonsense from Apple is frustrating.<p><a href="https://en.wikipedia.org/wiki/Hierarchical_Music_Specification_Language" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Hierarchical_Music_Specificati...</a>