[DoodleBob]

Sort of related, extensive chord progressions make great passwords.

C-C#-Db-D-D#-Eb_E-E#-Fb-F-F#-Gb-G-G#-Ab-A-A#-Bb-B-B#-Cb

[Right_Wing_Madman]

Sort of related, extensive chord progressions make great passwords.
C-C#-Db-D-D#-Eb_E-E#-Fb-F-F#-Gb-G-G#-Ab-A-A#-Bb-B-B#-Cb

The example you gave would be a disaster for bitcoin password protection.

Your "chords" are only the 12 notes that make up an octave and a modern fast computer could break the code in seconds. Instead, make use of the at least three-note 2,341 unique playable chords and the total possibilites are effectively endless.