share!
Okay. There's probably complicated theory to it but here's my understanding. And please forgive me for including stuff anyone who has been playing music for a month would get. But it helped me to start with the basics and add to that
What's a dim chord?
Lets say you're playing in the key of C
Y'know how your major triad is the root (C), the major 3rd (E) and the 5th (G, can't remember if it's called a major 5th or a perfect 5th)? Your diminished triad is the root but with the 3rd and 5th flattened. So Cdim is the root (C), a minor third (D#) and a flattened 5th (minor 5th? I don't know, it's F# anyway)
How to use them?
Again, in C. Your root major scale is C,D,E,F,G,A,B and the typical standard chords in that key would be I, ii, iii, IV, V, vi (C, Dm, Em, F, G, Am). You can use a dim chord whenever you want to play a chord who's root isn't in that major scale of the key. So if you're playing in C you can play C#dim, D#dim, F#dim etc. and they should all fit into the key.
Why to use them?
I don't know, jazz or some shit like that.
Hoping to learn how to use aug chords before I'm 50.