I'd like to be able to manipulate the amount of gain heard through my playing by adjusting the volume on my guitar, or picking dynamically. I can just noodle around and mess with this, but sometimes it's nice to have a bit of structure so I can practice with a bit more direction.
Are there any notable songs/exercises I could use to practice this? I don't mind which genre it is, I'm trying to broaden my playing horizons anyway, so anything will be great.