[CM] normalize-sound is an unbound variable

[e deleflie]

I'm trying to use normalize-sound as documented here:

http://ccrma.stanford.edu/software/snd/snd/sndscm.html#normalizesound

but I'm getting an "unbound variable" error. I've included a load
directive at the start of my script (as advised at the top of the
above page):

(load "/home/stuff/snd-9/dsp.scm")

... which apparently finds the file... but still no normalize-sound.
Actually I cant find any definition for "normalize-sound"  inside
dsp.scm ...

have I got the wrong dsp.scm? ... or something else ....

Etienne