Originally Posted by: Deanhorneck

I have a music theory book that described intervals as playing two notes within a scale at the same time.[/quote]

Okay, got it! Yes, some people call that an interval. Playing two notes together is called a diad, or dyad (from the word meaning "two of something").

I think Anders uses that term in this tutorial on how to use diads in rock soloing licks.

https://www.guitartricks.com/tutorial.php?input=1590

[quote=Deanhorneck]So if you play the root and the third note in the major scale at the same time it is a major third interval. If you play the third note in the major scale but flat and the root its a minor third interval. etc.

...

What I'm looking to do is spice things up by playing two notes at a time rather than having my solos just be singular notes throughout.

What you describing here is essentially harmony. You are harmonizing with yourself by playing two notes from the scale at the same time.

I have some tutorials that show how to play various diads here.

https://www.guitartricks.com/tutorial.php?input=1849

https://www.guitartricks.com/tutorial.php?input=1937

https://www.guitartricks.com/tutorial.php?input=1316

See if those tutorials are aimed at what you are trying to work on.

I also have these tutorials on major & minor scale harmonies that explain how harmonizing scales works. The purpose of the tutorial is to build whole chords (of three notes) on each scale degree. But I spend time explaining the concept & clearly show how it works with just two notes as the first step.

Major Scale Harmony[br]https://www.guitartricks.com/tutorial.php?input=2387

[br]Minor Scale Harmony

https://www.guitartricks.com/tutorial.php?input=2393

Let me know if any of that helps!