I recently revisited this post in search of some new harmonic ideas and thought I'd take a closer look at Yagapriya, a rather exotic scale for us Westerners that's very far removed from the diatonic scales we're used to. It also doesn't harmonize easily using my usual tricks so I wanted to treat it more as a unique thing in itself and see where it led me. (As usual I'm using "Yagapriya" as the name for a 12EDO scale; I won't have anything to say about Carnatic music in this post.)| cochranemusic.com
The Lulu Chord is what I call a chord formed by playing a perfect fifth with a perfect fourth nestled inside it: for example, C-C#-F#-G. The outer notes, C-G are the fifth and the inner ones, C#-F#, are the fourth. This chord is non-diatonic and, as far as I know, unknown in tonal music. But it was very popular with the Second Viennese School and is a good thing to get a handle on if you're looking for some modernist vocabulary.| cochranemusic.com