Where can I find orchestral music and violin concertos by Johann Sebastian Bach to play along?

The same answer as your initial post. Here is the MIDI file location:

http://www.jsbach.net/midi/

Check out PGMusic's MIDI Fakebook Volume 1 as well as the Classical MIDI Fakebooks Volume 2 und 3 -> http://www.pgmusic.com/addons.fakebooks.php?os=win

Thank you ! It is a pity that there is no content list.
Thilo

In addition there is a Classical Midi Styles Set (#11) with demos ->
www.pgmusic.com/addons.styles.sets.php?set=11&os=win

Thanks! This was a good hint!
Thilo