TOPIC: Music Theory Zoom Class #1

Dave,
In Music Theory class we learn harmonized scale chords by number, but don't we still have to know what the chords are, by note, that we are playing? I make this assumption, based on the tabs we are working on, which provide the chord changes by note. I find myself trying to number the chords in a song that I am learning. Is that right?
T

There is a numbering system and a lettering system. For example, in the Key of G, G is I, C is IV, and D is V. If you switched keys but played the same song, you would still be laying the same numerical progression. So the answer to your question is that if you know how to work the numbers in a region, then the only letter you need to work from is the root f the key.

Ok thanks.
I get it.

I guess my question is, if in the key of G (Route or I), and progression in the song is Em (Vi) and then D (V), then Am (ii), wouldn't you have to know the numbering by the notes given? So, as I learn a song, I tend to number the note/chord changes by number.
Am I complicating this, as usual, or as I noted before, don't you have to automatically know how to convert the chord by note to the numbering system?

No it is a fair question.

You would number your chords per key on your tab paper. Remember, a song is transcribed in one Key and the chords are added in the transcription alphabetically. You can number them as well , which may help you if you understand the regions of your instrument numerically.