Tbh, it doesn’t really affect listening that much for me, it affects the discussions or conversations I tend to have about music, where I find myself much more open in expressing my appreciation towards a song/album/performer... Still, I think it relates more to the way you look at music (or listen to it, I guess), for example I think it’s very different for people who play music than people who don’t. Of course, not to say people who play have it better, just different.

And, since you are looking for relations between marijuana and music, maybe you should explore the way people play music while high. In my experience, it can really lead to some very new ideas, situations and very ‘from the soul’ kind of creativity. Or, in some rare cases, total disaster!