Originally Posted by: bcraig4J

Trying learn Harmonic buliding tension Chords in Key Of C

first with just two intervals just Ascending in pitch and descending in pitch back to the tonic

and sound and make Harmonially sense

example let say

be like C all the way up to C 13 and back to C home

just using two intervals that give each 2 note chord it special Quality

I'm not entirely sure what you are trying to do. It sounds like you're playing harmonies from the a scale.

I did this tutorial on playing the harmonies of a scale. The second lesson covers the major scale in thirds.

Major Scale Harmony

https://www.guitartricks.com/tutorial.php?input=2387

This tutorial is the first of a series on how to create different kinds of harmonies.

Harmony Guitars 1

https://www.guitartricks.com/tutorial.php?input=1965

There is also this tutorial about scale practice in which I do pedal point exercises. That might be what you are referring to.

https://www.guitartricks.com/lesson.php?input=11270&s_id=451

Hope some of that helps! If not, please ask more. Best of success with it.