In 4(b), the Keyboard Chord Decoder shows how to make each of the four related min7b5 chords from the "chord above; the raised note is the seventh of the new min7b5 chord. The music for 4(b) shows the transformation of our pal the Ddim7 to an Fmin7b5 on beat 1 of bar 1, and an Abmin7b5 over E on beat 4. In bar 3, the Dmin7 starts as a Dmin7b5 but quickly morphs through a succession of related harmonies with the chromatic movement of the inner voices, ultimately becoming a G#min7b5 over the E on beat 3, then an Fmin7b5 over E on beat 4.

Keyboard Chord Decoder 3 The family of min7b5 chords in the "chord above"