The 7th chord will be built using only the notes of the scale we are interested in.

Starting from the 1st scale note, each lesson step below will take each note in turn and construct a 7th chord using that note as the root / starting note of that chord. The piano keyboard below contains the notes of the Bb major scale. This step shows the scale note names that will be used to construct all 7th chords that harmonize with those scale notes. The half-diminished symbol ' ø' is placed after the roman numerals to indicate this is a half-diminished 7th chord.Ĭhord names for B-flat major chord 7 Chord positionĪ half-diminished 7th chord in root positionĪ half-diminished 7th chord in 1st inversionĪ half-diminished 7th chord in 2nd inversionĪ half-diminished 7th chord in 3rd inversion Just like a minor chord, the half-diminished 7th chord is constructed using a minor third interval, so the roman numeral is shown in lower case. The roman numeral for number 7 is ' vii', and is used to indicate this is the 7th chord in the scale. This subtonic 7th chords root / starting note is the 7th note (or scale degree) of the Bb major scale. The B-flat major chord vii ø 7 is the A half-dim7 chord, and contains the notes A, C, Eb, and G.

This step shows the subtonic 7th chord of the B-flat major scale.

B flat major 7