First let me say I am self taut and this is my first time using these forms. So bear with me.
You are right. There is a little more to it than just sliding the numbers over. You must keep the same interval or distance between notes. So lets now look at the key of "D"
Key of "D" (note: on sheet music the key is shown using {##})
1 2 3 4 5 6 7
D E F# G A B C# (notice you now have two # notes)
w w h w w w h (note w=whole step ~ h=half step)
Now put 1~4~5 together, D~G~A Your two off chords are 2 & 6
(Note The 6 note is a minor chord, 99% of the time, Thus making
Bm the relative minor too "D" major. Also the 2 note can be a minor chord sometimes
Now for the triad that makes a "D" take your 1~3~5 (D~F#~A)
So if you was at the piano striking those 3 notes together will ring a "D" chord. Now lets look at a "D7" it takes Four (4) notes
played together, again use 1~3~5 but add in 7 thus (D~F#~A~C#)
Like I said I have never taken a music class or lessons. Seems I learned it the hard way. So if i have gotten any of this wrong
please point it out to me.
Respectfully,
Les Carney
Cave City, Ky.
lescarney@hotmail.com