#1
If I'm playing a solo how do I know what key it is in and what scale is required for me to play harmonizing thirds?

I understand that the key is the tonic note of the scale but what I start in the middle of a scale that I can't indentify then I wouldn't be able to discover the tonic.

Help!
#2
You'd have to look at the other notes in the scale, when youget about 5 or 6 ntoes theres very few scales that it could fit in. Also look at the backing chords for a hint. If you want to harmonise your solo in diatonic thirds just play a note either a m3 or a 3 above the note your harmonizing with, which ever fits into the scale.
Quote by cakemonster91

*chuckle* A peanut. With a face.



Go to your staff paper and re-write this song a half step down so on the paper it'll be like you have a "C" just move it down to a "B#"




Know your theory, then play like you don't.

#3
Write down the notes you are playing and the intervals, and compare them to the Major scale's.
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#4
You know the key by the key signature, and if you want to play a scale that harmonizes thirds you'd use the scale that's a major/minor third above the original scale. So say you wanted to harmonize a major third with G major, you'd play B major. Or if you wanted to harmonize minor third with E minor, you'd do G major.

To figure out what scale you're playing, you need to know the notes of your major scales, your relative minors, and your key signatures.
#5
alright so I said I KNOW that to harmonize you would go up a 3rd.

What I am asking is lets say I WROTE a solo and I wanted to know, using theory, the key of the song...for those of you who said listen...
Being that I am trying to find the key there wouldn't be a key signature...duh.

My question is how do I find the tonic note in a scale if I started on something other than the tonic.
#6
Well I apologize, the wording of your post confused me.

Just look at the notes you're playing. If you see you're playing, E D F# B G A C#, you can tell it is D Major/B Minor because it has 2 sharps.