[CM] Snd tips and tutorials

[Juan Reyes]

For those interested in tackling a bit of Scheme I have updated the Snd
section of Users-@-PlanetCCRMA with few tips and synthesis tutorials for
using Snd as a "real" composition engine and as a signal processing
tool. 

Here are the links:

http://ccrma.stanford.edu/guides/planetccrma/SND.html

http://ccrma.stanford.edu/guides/planetccrma/FM.html
http://ccrma.stanford.edu/guides/planetccrma/Additive.html
http://ccrma.stanford.edu/guides/planetccrma/Digital.html
http://ccrma.stanford.edu/guides/planetccrma/Ladspa.html


  --* Juan