Chord progressions built on the notes of the melodic minor scale aren't as common as progressions based on other scales. The reason is that chords built on melodic minor scale notes don't tend to work so well together. This doesn't necessarily mean they're unusable and it's worth noting the chord differences between the minor scales because minor keys are often made from a combination of the minor scale variations.

The chord chart shows the triad and 4 note extended chords belonging to the key of Bb Melodic Minor.

• Bb Melodic Minor scale notes: Bb C Db Eb F G A