Wenn wir in hochsten noten sein,
(When we are in the greatest difficulties)
BWV 641, is a piece of the Orgelbüchlein
(Little Organ Book) by Johann Sebastian Bach, a collection of 46 preludes for organ almost exclusively written during the
1708-1717 period, while Bach was court organist in Weimar.
The collection is defined by Bach himself
in the title page as '[a book] in which a beginning organist receives given
instruction as to performing a chorale
in a multitude of ways while achieving
mastery in the study of the pedal,
since in the chorales contained herein
the pedal is treated entirely 'obbligato'.