In my quest to learn music theory I got myself a MIDI controller. It’s more than I need now, but a lot LOT less than a full sequencer.
Basically I wanted to get something that I can more directly learn how chords sound and interact with each other than a guitar. And this doesn’t take anything away from a guitar either. It’s like two sides of the same coin… the guitar is very direct with the interrelationships between notes on a string, but way less direct when you have multiple notes at the same time.
So, most of the strings on a standardly tuned guitar are a perfect fifth apart. But as you start layering more and more notes together it’s easy for me to get lost. But a keyboard instrument has less initial effort to get to that same point.
All of it is related.
And all of it is important.
I just like learning how all of it fits together.