[CM] processing multi-channel Ladspa effects in SND

[Bill Schottstaedt]

> does that sound like a possible reason that SND could not execute a plugin? 

No.  What error are you getting?  Which Ambisonics plugin are you using?
Also, I notice in your first message that you are calling it:

(apply-ladspa (list (make-sample-reader 0 0 0)  ;chan 0
             (make-sample-reader 0 0 1) ;chan 1
             (make-sample-reader 0 0 2) ;chan 2
             (make-sample-reader 0 0 3) ;chan 3)
              (list "ambis1" "Ambisonics-square-decoder" 0 1 1.44 2 500 2) 
           duration? origin?)

but the first argument list close paren is commented out -- the "; chan 3)" comment
goes to the end of the line.  Could it be that you want:

(apply-ladspa (list (make-sample-reader 0 0 0)  ;chan 0
             (make-sample-reader 0 0 1) ;chan 1
             (make-sample-reader 0 0 2) ;chan 2
             (make-sample-reader 0 0 3)) ;chan 3
              (list "ambis1" "Ambisonics-square-decoder" 0 1 1.44 2 500 2) 
           (frames))

Emacs indentation and paren-matching makes it easier to find this kind of problem.