Well, I’m having a lot of fun playing with triad pairs, so I thought I’d share some insights. I’ve been spending some time with the 4th harmonic environment, and enjoying the characteristic note 7. But note 7 does not appear in the 4 chord, so I’ve been alternating between a 4 chord triad (notes 4 6 1) and a 5 triad (5 7 2). This is a lot more satisfying, to make use of the note 7.
Then I moved on to the 5th HE, and found some nice sounds with the same two triads. I’m sure there’s lots more combinations, and mixing major and minor triads, to be found, in other HEs as well.
It’ll be fun trying this over chord progressions as well, but I’m not there yet. Anyone else tried playing with triad pairs? I think it’s best if they are close (a whole tone or semitone apart) and so don’t share any notes. There’s probably some complex music theory to explain why they work, but it’s a simple idea, and fun to play with.