Notes:

This is just the intro/outro jam of The Wheel, where they hang on a C chord for as long as they feel like it. I think of this one as ionian for sure, but I do find that if I hang around the major 7th (B) too much, it loses the vibe of the song.

Video Links:

• The Wheel (Grateful Dead / Jerry Garcia) - 10 minute backing track (C ionian)