This content is for an older version of Synfire. The current version is more streamlined and advanced, but most of the functionality shown here still exist.
A animated gif made by @petearch where he is explaining how a drone setup for General midi (16 midi channels) in Cubase can be made.
What GM soundmodule is here used ..
Especially the configuration for the input transformer in Cubase is needed to get the right midi channel routing.
Note: the drone relocation handling in Synfire in this animated gif is different then in the current version of Synfire.