Re: [Jsynthlib-devel] FW: Re: What is the JSL way to deal with negative param values?

[Bill Z. <wrz...@po...>]

Steven Schmidt wrote:

> Do you know of an existing editor that works in this manner?

What part is giving you trouble?  Are you familiar enough with binary 
and boolean math to work through this?  Here are some links with an 
excessive amount of detail:

http://mathforum.org/dr.math/faq/faq.bases.html
http://mathforum.org/library/drmath/view/54311.html
http://mathforum.org/library/drmath/sets/select/dm_twos_complement.html

The "twos complement" link is most relevant, as it explains how negative 
numbers work.  I can't find a good, decisive tutorial on binary math, 
but if you search around that site, you should be able to find answers.

Anyway, to answer your question, my own Casio CZ editor is reasonably 
similar.  You need to chop your numbers into 7-bit chunks, and the CZ 
works with 4-bit chunks.  The math is the same, only the constants 
differ. I've pulled all the code into a common superclass:
    synthdrivers/CasioCZ1000/CZModel.java

-Bill