Hi All,
I currently use an A-30 midi controller with a Roland RS-9 keyboard as the 
sound source. Each keyboard can play two zones. The RS-9 uses channel 1 and 
2 while the A-30 uses channel 3 and 4  for a total of four channels; 4 
zones.    I am looking to upgrade the A-30 to a midi controller that can 
handle 4 zones rather than 2 zones.  This will give me 6 zones instead of 4 
zones.  Midi controller - 4 zones,  RS-9 - 2 zones.  The question I have is 
: Can  two of the four zones used by the proposed new midi controller 
actually be used to control the two zones on the RS-9 ?   Or is this 
something that some controllers can do while the cheaper ones can't. Or is 
it a function of what can be sent/received per channel or something like 
that.  I am in the process of reviewing and ultimately purchasing either a 
new midi controller to replace my A-30 or another lightweight synth similar 
to my RS-9 which can double as a midi controller easily. Thanks for any info 
you can share. 

Mark wrote:
> Hi All,
> I currently use an A-30 midi controller with a Roland RS-9 keyboard as the 
> sound source. Each keyboard can play two zones. The RS-9 uses channel 1 and 
> 2 while the A-30 uses channel 3 and 4  for a total of four channels; 4 
> zones.    I am looking to upgrade the A-30 to a midi controller that can 
> handle 4 zones rather than 2 zones.  This will give me 6 zones instead of 4 
> zones.  Midi controller - 4 zones,  RS-9 - 2 zones.  The question I have is 
> : Can  two of the four zones used by the proposed new midi controller 
> actually be used to control the two zones on the RS-9 ?   Or is this 
> something that some controllers can do while the cheaper ones can't. Or is 
> it a function of what can be sent/received per channel or something like 
> that.  I am in the process of reviewing and ultimately purchasing either a 
> new midi controller to replace my A-30 or another lightweight synth similar 
> to my RS-9 which can double as a midi controller easily. Thanks for any info 
> you can share. 
> 
> 

The M-Audio Keystation Pro 88 controller will control 4 zones.