4 examples for say
# Right syntax for speaking at a different rate
say -r 1 "I am speaking at a different rate"
# Fred is the voice Radiohead used for "Fitter Happier"
say 'Fitter, happier, more productive' -v 'Fred'
# change the rate at which say speaks
say -r=10 "I am speaking at a different rate"
say -r=100 "I am speaking at a different rate"