Emu XL-7 & MP-7 User's Group

--- In xl7@yahoogroups.com, "kevinj_j" <kevinj_j@y...> wrote:
> After a few days of sleepless nights and jolt cola, I'm about 1/2 
> way there..Just a quick STOOPID question:
> 
> for negative edit parameter values are you using 2's compliment or  
> sign magnatude??

The explanation is on p 78 of SysEx Manual v. 2.2 [pdf] (the next to 
the last page not including "the back cover"),  I think its there (in 
the back)in manuals v 2.1 and v 2.0 also.

EG For remote control session: rotary event: main encoder

7F 7F = counterclockwise knob turn one notch (i.e., -1)
00 7F = counterclockwise knob turn 128 notches (i.e., -128)


sample application:

If front panel is (1) at pattern view menu (2) with the cursor at the 
pattern number position (3) showing 127-7 as the current pattern, then

00 7F will simluate counterclockwise main encoder turns to 127-6.
00 7E will simulate counterclockwise main encoder turns to 127-5.
01 78 will simulate counterclockwise main encoder turns to 000-0.

[In short, LSB MSB nibblized 2's compliment]

Not sure if all other parameters follow the same LSB MSB order.  I 
seem to recall some varaitions.

Hope this helps.

Dr. Steve