Musical Goal

I met the musician I was hoping to become. He was a mandolin player, dropped by the jam group and sat in last go round. Here's how he did it–we'd start to play a song, he'd look to see what chords I was playing, then he would know the key and progression–a lot of what we do is 1-4-5, and he'd improvise. Chords, lead, little frills, no problem.

That's what I want to learn to do. Not hard, in theory ...