Do improvised 'chord substitutions' work in a band setting? Like sometimes if I'm in C and I might play an E7 or an A7 (instead of Em or Am), but if I couldn't just do that on the fly with a band right? Like if I play an E7, but the guitarists plays Em that wouldn't really work. Or (still in C) I do a C#7 instead of the G7, but the guitar player does G7 that would clash... I know bands can improvise and stuff, but do the exact chord voicings pretty much need to be worked out beforehand? I've been playing music a long time, but I'm so used to just playing by myself and playing with other people is so new to me, it feels like I'm starting back at square 1?
the longer you play in groups (or better yet, even, with the same people) the more you all will rapidly discover where the room to roam is. can be fun and exciting, as relationships develop and things are learned, together