#20 Exception in Play.audio(Score)

[Steffen Groendahl]

I get the following exception when calling
Play.audio(Score):

-------- Playing Score as Audio ...Exception in thread
"main" java.lang.IllegalThreadStateException
at java.lang.Thread.start(Native Method)
at jm.music.rt.RTLine.start(RTLine.java:202)
at jm.audio.RTMixer.begin(RTMixer.java:159)
at jm.util.Play.audio(Play.java:397)
at jm.util.Play.audio(Play.java:363)
at TestPlayAudio.main(TestPlayAudio.java:34)

Se example in attachment.

From the souce code I can identify the origin to be the
run method in jm.audio.Instrument. But at the moment I
don't now the course more precisely.

[Steffen Groendahl]

[Steffen Groendahl]

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Now I identified the course: In jm.util.Play.audio(Score,
Instrument[]) a RTPhrase instance is created for each phrase
and instrument (- that means 4 instances of RTPhrase in my
example - one instrument with 4 phrases). When the RTMixer a
little later is started (method begin) it tries to start the
thread for the instrument for each phrase, ie 4 times. This
is not allowed and gives a IllegalStateException.
The cure: ? To allow polyphony (from one instrument) one
could perhaps succeed in calling the clone method of the
Instrument before adding a clone to the RTPhrase, but a lot
of code then has to be done; first of all the Cloneable
interface has to be implemented and the clone method
overridden. I expect the latter to be quite a challenge !