hello and happy 2006!
way back in cm-2.4 days i could output cmn data in parallel with midi
output and it would get passed along when the events were output to a
cmn file - e.g. adding dynamic marks at significant amplitude changes
like this:
...
(output (new midi start (+ ahead (now)) keynum tone
duration riv amplitude amp channel ch))
(when (not (eq dyn old-dyn))
(output (new cmn time (now) channel ch
data (list dyn))))
...
['dyn' being a dynamic marking ('ff, 'mp, etc.) determined through a
(amp->dyn) lookup function]
when i tried something similar in cm-2.7:
...
output (new midi :time (now)
:keynum (nth p notes)
:duration rhy
:amplitude (max amp 0)
:channel stf)
if (not (eq dyn old-dyn))
sprout (new cmn :time (now)
:staff stf
:data `(,dyn))
...
trying to output this to a cmn file throws this error (in cmucl-19c, of
course):
No matching method for the generic function
#<STANDARD-GENERIC-FUNCTION CMN::ODB-ONSET (2) {58F361B1}>, when called with
arguments (#<CMN::SCORE-OBJECT-LIST {58393395}>).
[Condition of type PCL::NO-APPLICABLE-METHOD-ERROR]
Restarts:
0: [CONTINUE] Retry call to :FUNCTION.
1: [ABORT ] Return to Top-Level.
Debug (type H for help)
("DEFMETHOD NO-APPLICABLE-METHOD (T)" #<unused-arg> #<unused-arg>
#<STANDARD-GENERIC-FUNCTION CMN::ODB-ONSET (2) {58F361B1}>
(#<CMN::SCORE-OBJECT-LIST {58393395}>))
if i change the (new cmn ... so it has a :note and a :duration there's
no error, but the output contains two notes (the midi and the cmn) every
time the condition is met.
surely there's a more elegant and general way to do this? i'd rather not
have to change the output function of my algorithm depending upon
whether i want to see something (.cmn) or hear it (midi).
thanks in advance for all help.
bill
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