Doepfer

Hi there!

I think you will find what you are looking for in this book:
The Acoustical Foundations of Music (Hardcover)
by John Backus.

http://www.amazon.com/gp/product/0393090965/qid=1145150365/sr=1-2/ 
ref=sr_1_2/102-5736561-7015355?s=books&v=glance&n=283155

Check out the table of contents:
http://www.amazon.com/gp/reader/0393090965/ref=sib_rdr_toc/ 
102-5736561-7015355?%5Fencoding=UTF8&p=S003&j=0#reader-page

enjoy,

sfrules