This is a final version of this piece
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O Sacred Head, Now Wounded is one of my favorite hymns. It started life in the 11th century as a poem, later set to music. Bach harmonized it around 1734.
This version is scored for mallet instruments and woodwinds, specifically marimba, vibraphone, finger piano, flute, oboe, clarinet, bassoon, and sine waves. The basic idea is to keep the marvelous Bach harmonies but stretch it out a bit. Each chord is repeated or held and arpeggiated before moving to the next one.
The tuning is low integer just, approximated in 72 EDO. You can see the specific ratios used in the chart above. Click on the image to make it bigger.