His 1739 volume of chorale arrangements, the third part of "Clavier-Ubung", is aka "German Organ Mass"
[DOC] [TLE] Johann Sebastian Bach - Scribd [PAR] to play the violin and harpsichord, and his brother Johann Christoph Bach taught 
..... Bach's appointment as Court Composer was part of his long-term struggle to 
achieve greater ..... best-known works (the six trio sonatas, the German Organ 
Mass in.