festival- volume too low

[Pollywog]

What is the best way to increase festival's output volume?

This is what I have in /usr/lib/festival/siteinit.scm:

(Parameter.set 'Audio_Method 'linux16audio)
(define (SayText text)
"(SayText TEXT)
TEXT, a string, is rendered as speech."
(utt.play (utt.wave.rescale (utt.synth (eval (list 'Utterance 'Text text)))
6.0)
)
)

;; If you use NAS, you can uncomment the following line.
;(Parameter.set 'Audio_Method 'netaudio)

(set! voice_default 'voice_ked_diphone)




thanks

--
Andrew