Re: What does "bass" mean now?
For a very clear recorded example of a tritone substitution in action, "Sarah" from Stick Figures, bar 8 and 12 (first one about 23 second in...)
https://greghoward.bandcamp.com/track/sarahMy friend John D'earth told me in the Latin bands in New York they had a saying...
"Mucho bass means mucho bucks..."
What I love about the left hand on The Stick is the dance between the bass and the rest of the chord...
Cheers!