i guess tht means a c major is made up of C, E and G....
a c major 7 is made up of C E G and B
i know that a c7 is made up of C E G and Bb or A#... the third note on the g string but umm i dont really get it....
i have a book which says this about dominant 7th chords... " what makes a 7th chord distinct? the 8th note in the major scale, or run of notes, is "flattened" or lowered in pitch, in this case by one whole tone less than it would be in a major chord. you might find this note referred to as the minor 7th, b7th or dominant 7th".... thts why i compared major chords and basic 7th chords..... i figured from this description that a 7th chord is just like a major chord ..the only difference being.... one note, a whole tone less than another note in the major chord.... this theory worked for me on A7 in which u unfret g string from the second fret playing a g instead of an A in an A major chord.....it works with D7 too where the b string is fretted at the 1st fret.... again if u compare this to a d major chord....u shift 2 frets back on the b string to get a D7 from a D major..... same goes for E7...the e major chord contains the note E on the d string....(2nd fret)....remove this finger lowering the pitch by a whole tone back to a D ...u get an E7....i cant use this logic to explain to explain a C7 chord though....which is why i am guessing that i am probably wrong......your explanation helped but i am having trouble with one thing..... ure saying that "
A C Dom. 7(C7) chord is built with this formula: 1-3-5-b7" and " the C Major scale is: C(1)-D(2)-E(3)-F(4)-G(5)-A(6)-B(7)" umm where is the the note b7 in this scale........i googled b7 or minor 7th notes and umm i couldnt make much sense of what i saw there.... thanks for ur help