Classical

Bach Prelude Progression (I–IIm–V7–I) Chord Progression

J.S. Bach. Basic baroque I-IIm-V7-I.

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  • Bach
  • baroque
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Roman numerals

  1. I
  2. IIm
  3. V7
  4. I

Roman numerals give each chord’s position relative to the key’s tonic, so the progression sounds the same in any key.

Chords by key

Key of C

C – Dm – G7 – C

Key of G

G – Am – D7 – G

Key of D

D – Em – A7 – D

All Classical chord progressions