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

[Steven S. <ste...@co...>]

Bill Zwicky wrote:

> Steven Schmidt wrote:
>
>> displays the correct value of -5 for the MSB/LSB combo of  7f 7b
>> (I haven't looked at why I had to subtact 128 (base val) to get it 
>> right, but that's a suspiciously even number)
>> So, have we a bug?  I'll try a slider and see if I have the same 
>> problem and report back.
>>
> Are the bytes still correct when the spinner reads -129?
>
> In a sysex message, the high bit must always be zero, and (I'm 
> guessing) your synth simply sticks the remaining 14 bits together to 
> form a number.  7f 7b is
>  0111 1111 0111 1011
> and if we drop the high bits and regroup the nybbles, we get
>  11 1111 1111 1011
> If you add 5 to that, you get zero.  So 7f 7b is exactly -5 in 14 
> bits.  (If you're running Microsoft Windows, you can try this with the 
> included calculator; it can handle both hex and binary.)

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