I was having trouble finding how to ask this question, but here's something I'm having trouble wrapping my head around. I'm no music theory expert, so I'm just trying to learn here. I like to noodle with chords and just explore sounds. One of the things I like to do is descend down from the I, to the vii, then vi, then V. But there's something off about that V chord that I need some help with. So let's say I'm playing in the key of C, and I start with a C major chord (C, E, B) Sounds great. Then I go to a B chord (B, D, A)...smooth, I like it so far Then the A chord (A, C, G) great I love it Then here's where it gets wonky...I drop to that 5 chord (G, B, F<<<) That F...sounds completely out of place. If I play an F# instead, it sounds like it fits the chord progression and feels right...But that doesn't make sense to me, it's a note not in key, and on top of that the 5th chord should be a augmented 7th right? I know that music theory is simply just theory, but it seems like descending down like that should feel nice and smooth, but that 5th chord sounds super tense and out of key.