Chords Chords and Rhythm Sean DanielsHow to Play Riffs Over 12 Bar Blues ProgressionsadminUpdated on October 23, 2018March 28, 2018Leave a Comment on How to Play Riffs Over 12 Bar Blues Progressions [contentwall] [/contentwall][ninja-popup ID=715] Sign up to get free lessons from Sean Daniel’s first instructional guitar package. GO!!!