Use tcsh (just enter /bin/tcsh) and then:

• repeat 22 echo "da" | say -v good
• repeat 26 echo "da" | say -v cello
• repeat 22 echo "da" | say -v "bad news"

and of course

• say -v cello droid

Was reminded of this today by:

@ericasadun for i in ` say -v ? | sed "s/ .*//g" ` ; do echo $i && say -v $i haters gonna hate hate hate hate hate && sleep 1 ; done

— mhoye (@mhoye) June 3, 2016