For anyone interrested, I uploaded a new release of ace to
http://www.atte.dk/ace/ For those that tried it a few weeks back, but
had problems even getting something through the thing, I added a few
debug flags. This could be helpful in understanding what goes wrong…

From the web page:

ace is a command line midi splitter/processor especially suited for use
together with csound. It allows for any number of “zones” to be setup,
each of which defines a passage through ace. Initial program changes
(optionally using csound instrument names) and volumes can be send for
each zone.

—
peace, love & harmony
Atte