[CM] CM>CLM communication

[Ken Locarnini]

I'm trying to pass arguments to a clm reverberator from cm-2.4, but am 
getting errors.  The clm manual says to use "reverb-data"

So I'm going:
(events (a) "test.wav" :reverb 'nrev :reverb-data (:lp-coeff .2))

but that triggers the error:
-APPLY: too few arguments given to #<COMPILED-CLOSURE-TELL-SND>

Any hints?  Thanks,
Ken