Blues on Bach

Blues on Bach is an album by the American jazz group the Modern Jazz Quartet recorded in 1973 and released on the Atlantic label. The album includes five arrangements by John Lewis of pieces by Johann Sebastian Bach, interspersed with four original blues pieces "on" [the name] "Bach"—in keys (and with titles) that spell out in order the name B-A-C-H.

The five pieces arranged from Bach originals are: "Regret?" from chorale prelude "The Old Year Has Now Passed Away"; "Rise Up in the Morning" from the 140th cantata "Sleepers Wake"; "Precious Joy" from the 147th cantata "Jesu, Joy of Man's Desiring"; "Don't Stop This Train" from the fugue by Johann Peter Kellner BWV Anh. 180 wrongly attributed to Bach; and "Tears from the Children" from the Prelude 8 in E-flat minor from Book I of "The Well-Tempered Clavier".

For the four blues pieces, the "spelling" of the titles follows the system Bach and his German contemporaries used, in which the letter B indicates B-flat, and the letter H is B-natural. So, the four blues pieces that spell the name B-A-C-H are in the keys of B-flat (major), A (minor), C (minor) and B (major).