This prelude to the chorale "Ach was soll ich Sünder machen" is the third one Oley wrote based on this melody. The first two (https://partitura.org/index.php/johann-christoph…ch-sunder-machen/ and https://partitura.org/index.php/johann-christoph…-sunder-machen-2/) feature an elaborated pedal part. This third one is manualiter only. It is a nice composition that follows more the harmonic outline of the choral than the melodie itself.
The recording was done with the Hauptwerk software and the sample set of the Holzey organ of St. Peter and Paul in Weissenau by Prospectum (https://www.prospectum.com/index.php?language=english&id1=2&id2=9).
Score available here: https://partitura.org/index.php/johann-christoph-oley-ach-was-soll-ich-sunder-machen-3