Alright so I'm near 100% sure that there is a problem with my intonation. As I progressed as a guitarist, so did my ear. I noticed that lot's of(if not all) the notes past the 12th fret are a bit flat. I checked this on my tuner, and I was right. I'm pretty sure this has to do with the intonation. Can someone please tell me what I have to do, to fix it?
Thanks in advance.