Good to have when working out arrangements with band mates.
A quick understanding of various theoretical nuances can lead to smoother practice sessions, with more playing rather than trying to get your point across to someone who, through no fault of their own can't keep up technically.
A quick understanding of various theoretical nuances can lead to smoother practice sessions, with more playing rather than trying to get your point across to someone who, through no fault of their own can't keep up technically.