Here is a chorale prelude, in the manner of a fughetta, on the hymn "Kyrie, Gott Vater in Ewigkeit". It is meant to be one piece in a set of chorale preludes based on the Lutheran hymnody. While it is short, I feel it could perhaps be more tightly structured and, likewise, I'll be the first to admit that, in my attempts to craft a contrapuntal piece with a cautious internal unity, I wrote a short fugue that lacks "variety" enough to maintain interest and move the listener even over its brief running time, up to its rather abrupt and unsatisfying ending.
The audio and score are attached below. I should add that the tuning is at 415 hz., the "Baroque pitch" standard.