So, I'm a guitar player, and I'm taking a music theory class. All of the theory we're learning about sort of revolves around the piano.

And I've never really had any formal training with theory, I know a little, but not much. So far we've sort of focused on the basics of sight reading by identifying notes on the Bass and Treble clefs as well as the Grand Staff.

Now we're starting to get into ear training, and it's been a struggle trying to identify the difference between Perfect 4ths, Perfect 5ths, and Octaves.

The instructor gave [this][1] site to us to sort of practice, but it's not really working for me.

I read somewhere to try and focus on the root note and that a perfect 5th would have a lower one and a perfect 4th would have a higher one, but that's not at all helping.

I don't know, I feel like all of the other people in my class are already pretty great at all of this and I'm not, so it'd be nice to have some tips.


  [1]: http://www.musictheory.net/exercises/ear-interval