Seen in a Fedora Community Portal post:
https://fcp.surfsite.org/modules/new...=41200&start=0
Quote:
You need to use Alsa output. Put this in your ~/.festivalrc
(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
(Parameter.set 'Audio_Method 'Audio_Command)
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I was desperately looking for a solution when I found this. It worked for me.