#1
just a quick qustion say i wanted to hamonize a set of notes by 3rds would all the notes go up 3 if u no wat i mean?
#2
You treat each note as if it was the key note and then play the third above it:

Example

C E G
E G# B


.... Unless I am totally wrong on that.

In C Major the third is E
In E Major the thrid is G#
In G Major the third is B
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