breath controller schematics

[bert mouwen]

Jeremy Brookes wrote:
 

> On the old Yamaha FM boxes (4-operator stuff at least), the Breath 
> Controller wasn't really a separate controller. It's value was added to
> the value of the mod

I don't know what boxes you are talking about. My BC-input belongs to a 
DX-11 synth. The BC controller information (controller 2) can be routed 
independently from that of the modwheel (controller 1) to several  -not 
all the same as for MW- modulation sensitive made parameters (such as the 
envelope bias per operator). If your synth box reacts like giving some 
extra modulation source of the same parameter, the routing of controller 
1 and 2 are both set to a lfo, but this lfo's sensitivity is set to 
different values for BC / MW. But you are free too choose an other 
parameter to be influenced by the BC. 
Same story must apply to a TX81Z, DX21/27/100, that are compatible with 
the DX11- with some differences that do not affect the essential 
possibilities of the use of BC-info.

 
> The BC input on the 4-ops could be controlled by a pot. It's 3 pins, 
> one at 5V, one at 0V, a pot across these with a wiper to the remaining 
> pin.

Is this safe to do? I really are almost a witnit on electronics, reading 
most of your messages with touting ears all the time.
This safety item is my main concern. When something gets damaged inside 
the DX11 I am in sever financial problems. Building some 
controller-device that acts like a pot is not the biggest problem.
To main result would be to have another controller on my "master 
keyboard" that can be routed to soundparameters within boxes like the 
EVS-1, be it or not transformed by intermediate software.

grtz. bM.