FWIW, this is an option on OS X–

moo@cowi>perl -e 'system say => qw/ Ohai der /'
moo@cow>which say
/usr/bin/say
# say - Convert text to audible speech
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I use it for short scripts or command line stuff since the visual bell isn't always enough. Stuff like–

run-my-thing.pl || say "Epic fail, hire a real programmer"
# or
echo "Long running script." && say "Done. Finally. Jeeze."
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