Is music theory universal?
I'm currently 17 years old and want to dedicate myself to music. I've listened to different styles of music now: jazz, funk,groove also classical (Bob acri>any pop Idol in 2018). 2 weeks ago I bought myself a Guitar and a Piano and played/learned songs and trained my hands for each instrument. Question comes now: I want to learn the music theory of the guitar first but can I apply that knowledge to the piano (once I learned most of the important things). Like Barre chords can't be played on the piano right? Is music theory universal for any instrument?