EXS 24 Logic Sampler Users Group

On a fine day, 13-11-2003, John Abram wrote:

>Does anyone know if it's possible to control the coarse tuning
>parameter of an EXS instrument with MIDI?
>I'm trying to get my CTRL #65 pedal to give me a semitone up when
>pressed.

Should be possible...  Connect a Monitor object to the mixer strip 
containing the EXS.  Drag the coarse tuning knob and watch the 
monitor.  It should say something like "F 1 23 12": a fader-23 event 
on channel 1, value=12.

Now create a transformer.  Cable from Physical Input SUM outlet into 
the transformer. Cable 1st outlet of transformer straight into the 
mixer strip.  Cable 2nd outlet of transformer into the To sequencer 
object.

Set up the transformer like this (double-click the object to open it):
- set the top pop-up to "Automation Splitter"

- set Conditions to:
   Status = Control
   Cha (leave alone, or set to your pedal's channel)
   -1- = 65 (sure it's 65?  a sustain pedal sends out 64...)
   -2- leave alone

- Set Operations to:
   Status Fix Fader
   Cha Fix 2
   -1- Fix <the value you've noticed in the Monitor: 23 in the example above>
   -2- depends on what the pedal sends out

About this last remark (the -2- operation).  Suppose your pedal sends 
out value 0 and 127 (released and pressed), and 'no detuning' on the 
EXS is value=64 and one semitone up is 70 (which you can check again 
by observing the Monitor object while changing the coarse tuning 
dial).  So now you want to map values 0/127 to 64/70.
The easiest way to do this is to set the -2- Operation to "Use Map". 
Then in the map (bottom left corner) dial the 1st numerical field to 
0 and the 2nd to 64.  Now dial the 1st field to 127 and the 2nd to 
70.  You've just created a 2-value map that performs the required 
mapping.

By using an Automation Splitter transformer (i.e. Fader events 
instead of plain controllers), you can even record your pedal 
movements as track automation on the EXS track.

And now just hope & pray that I got all the details right :-).

-- 
Hendrik Jan Veenstra   h @ k n o w a r e . n l
Omega Art: http://www.omega-art.com/