Myriad Harmony-Assistant & MyOrgan ou Hauptwerk-1 Chapter 9
Version française
 
Working with expressive manuals.
Certain organ virtual has expressive keyboards. In this case, one or more pedals actuate the windows of the expressive windchest.  The solution for Harmony-Assistant: the Midi curves.
 
Midi control of the expression box
Adjustement for MyOrgan

Certain organs has part of their pipes enclosed in a box whose hearing can open more or less to exploit the sound volume of amanual. This box of expression is opened or closed withh a pedal placed at the top of the pedalboard. The pedal itself can be controlled remotely, very easily by a specific Midi curve of Harmony-assistant.

Right-click on the expression pedal of MO to check that it is set on Bx Controller, Chanel 1,3 or 4 according to the manual and that the data value is well of 04. This number 04 (decimal) is not completely an arbitrary choice, you can choose some another but in all the case it will have to match with that which you will choose for the Midi curve of Harmony-assistant.

Une pédale pour un clavier écho expressif

 
Adjustments on  Harmony-Assistant
To move the pedal of expression, you will have to use one of the Midi curves of the registration staff.
Choose “Curve Midi A” and draw your curve of expression with the mouse as you are perhaps already accustomed to do it for the chorus or the panoramic
 

The midi curve "B" contols the expression pedal of the positive, and curve C the swell.

 
To function, this curve needs to be initialized. Choose the menu “ configure” then click in the list on “Specific A” and fill with the following text: “Bn 04 mm”. This text indicates to the curve to send message midday for the controller n°04 and 4, remember is the data bumber selected for the pedal to expression. The parameter “mm” will be replaced in the messages by the value of the curve, each time this one evolves.
See, that functions, start playing the score and looks at the small pedal  moving by itself !