Question with $PLAY_COMMAND

[Steve Holmes]

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Hey, I just built the git version of speechd and so far, so good but I
do have one issue now.  First off, I build the program by configuring
with --with-alsa and --with-libao support.  I have both systems
available on my system and I want to include them for package
building.

I now have aproblem where the $PLAY_COMMAND is not being populated
when I use swift-generic for the output module.  If I use
espeak-generic, it seems to be populated as it will speak with the
espeak voice.  It is silent when I use swift-generic.  Now I went in
and changed the $PLAY-COMMAND to 'aplay' without the tick marks and it
works fine.  With version 0.6.7, the $PLAY_COMMAND was used regularly
and always worked fine.

My question here is "Where does the value of $PLAY_COMMAND get set and
how for each modules?"
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