A few years and a few cellphones ago I downloaded a piece from Contrebomvarde that was about an 8+ minute improvisation on "Wachet Auf". Unlike orher pieces I downloaded, I either was in a hurry or something happened in the downloading and my usually thorough label (title, composee, organist and sample set) did not come through. It has remained on Google Play Music ever since but the only thing identifying it is the title of "ImproWachetAuf". It was obviously uploaded on a very large organ and starts off very quiet and over the 8+ minutes gradually builds to a thundering climax on full organ. I have no clue who the organist is or on what sample set it was recorded and appears to have been since removed from CCH as an advanced search yields no results. Can anyone here help me to identify this piece? The improv is in my opinion stunning,and I would like to be able to compliment the artist as well as find out which set was used.