Travis Picking 2.0: Selecting Alternate Bass Notes for each chord

Which bass notes are used as the two alternating bass notes for each chord while "pattern" picking or Travis style finger picking? With the Travis Picking pattern that I use and teach on my channel, the D-string (whether open or fretted on whatever chord) winds up becoming the second alternate bass note, no matter what. The first bass note is played on the 1st downbeat of any chord. I hope this lesson helps to demonstrate what I mean.

Travis Picking Made Ridiculously Simple: A Tutorial https://youtu.be/mhsNQlGOqMQ
Travis Picking Made Ridiculously Simple: Part 2 https://youtu.be/OpprFxiwr1
Travis Picking Made Ridiculously Simple: Next Chapter https://youtu.be/y8KD3X0umm0
Which Travis-Picking pattern Do I Start With? https://youtu.be/tVqjZ6fw7gI
How to Play 4+20 by Stephen Stills: https://youtu.be/2IumrR8dXx0

Видео Travis Picking 2.0: Selecting Alternate Bass Notes for each chord канала Dennis Anthonis