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

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

Steven Schmidt wrote:

> > * In Java, bytes are signed.   So if the range is 0..255 before, 
> > casting it to a (Byte) will change that to -128..127.  Thus, reading 
> > patch.sysex[index] may yield negative numbers.  I had to compensate in 
> > my CZModel.getByte.
> 
> This is what I want.  How can I get this behavior in a model class?
>
>  
>
You get it all for free.  Bytes are already signed, so if your numbers 
are in the range -128..127,  things will just work.  You can read and 
write patch.sysex[index], and you'll get what you expect.  If instead 
your values are 128..255, then things will half work -- you can write to 
patch.sysex[index] just fine, but when you read it back, it will be in 
the range -128..127.

Note that this goofiness is on top of the fact that your synth has 
probably scrambled the bytes a little to get around the restrictions of 
the sysex message.  So you need to deal with that, on top of dealing 
with signed bytes.

The easiest way to learn is to just do it, see where it breaks, then get 
help with that.  Don't be afraid, it's only code!

-Bill