Thank you very much, Terrym! This helped a lot
in order to "select a song", send a "F3" message to the drumbrute,
where F3 is followed by the song number (in hex): for example:
"F3 00" selects song number 1 (as 1 is written as "00" in hex).
(this "system common" type of midi message is actually called "midi song request",
in case someone would want to google it).
Meanwhile i found this "Drumbrute Faq":
it mentions a different method of selecting Bank and Pattern:
(it's under: "Can I change Song / Bank / Pattern from a MIDI message?")
will both methods work?
or am i just confused by all this Midi talk
thanks again to Terrym,