Bach's BWV 255 is a sacred cantata movement known for its deeply moving aria, often performed instrumentally. It features a poignant melody supported by rich, contrapuntal accompaniment, embodying Baroque expressivity.
Requires significant control over legato phrasing and the ability to balance multiple independent lines.
Ach Gott und Herr (BWV 255) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Ach Gott und Herr (BWV 255) lasts about 5 minutes.
Ach Gott und Herr (BWV 255) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.