While synths have been current topics here are a couple of links that may be
of interest:
A free book by Simon Cann
How to Make A Noise
A comprehensive guide to synthesizer programming
http://www.noisesculpture.com/
An interesting site that includes Acoustic phonetics {formants}
http://www.umanitoba.ca/faculties/arts/linguistics/russell/138/notes.htm
Joy
Tom