Myriad Harmony-Assistant & MyOrgan ou Hauptwerk-1  Chapître 8
Version française
 
The rules we will use.
 
Rule to send a program-change message.
These rules are placed in the registration staff. The criterion can be notes with specified pitch. What imports is that the rules change the staff instrument for another precise one, set to Midichannel 5. The choice of this new instrument determines the number of the program change sent.
These rules are necessary to advance or move back in the sequence of registration (frames). They can be also used to send other orders midi which you could need.
 
 
 
The  instruments renamedPrg1 and Prg2 (respectively Std-Piano 2 and Std-Piano 3) send the messages prg changes #1 and prg changes #2 corresponding to Previous and Next frame.
Rules to transmit Midi messages "prg-change"
 
There it can seem to have confusions in the number of prg-changes, but it is simply the fact that HA counts the midi data from 0 to 127 and MyOrgan from 1 to 128. Simple point of view.
 
Caution :
Do not remove the unutilised instruments before having definitively completed your score. If not, the rules which will try to use these “dumb” instruments could not function any more.

 
 

The default instrument and the rules instruments of the registration staff

 
Rules to play on an other manual than Great
For a staff, changing the manual, means that it is necessary that the staff concerned change its instrument. There still, the choice of the instrument in HA imports little since it will not be heard. All that is necessary, is to give to the new instrument a Midi channel number which matches with that of the required manual.

The rule must be placed at both  higher staves (in the case where the two hands would change ther manual). The criterion used will be preferably a criterion based on the velocity, since completely invisible on the score.
 
Avec cette loi, les notes de vélocité inférieure à 40 sont jouées sur le positif

not visible but velocity bar n°2 has been set <40 to play on Positiv.