The Difference between Dm7 Chord and d7 Chord (Piano)

First of all, the composition is different:

1.Dm7 chord:

It consists of four sounds: d, f, a and C.

2.d7 chord:

Consists of four sounds: D, #F, A and C.

Second, the nature is different:

1.Dm7 chord:

The Dm7 chord is a minor seventh, a minor third plus a minor seventh.

2.d7 chord:

The d7 chord is a seventh chord, that is, major triad plus seven minor degrees.

Extended data

The composition of seven chords is a chord composed of four tones superimposed by three degrees. What are its distinctive features? The distance between the root note (lowest note) and the crown note (highest note) is seven degrees, so there are seven kinds of seventh chords, and their dissonance and tension all come from the seventh note.

The seventh chord is similar to the third chord, and the following is also composed of "root tone", "three tones" and "five tones", which are also counted from bottom to top. The fourth tone, the highest tone, is called "seven tones". The seventh chord is the same: when notation is marked with numbers, it is 1357 from bottom to top.

Musically, it is a group of chords composed of root, minor, pure fifth and minor seventh. It can also be seen as a minor chord of seven degrees.

Baidu Encyclopedia-Seven Chords