Bc2000 (for the BCF2000 & BCR2000)

The sad news.... BC2k can't handle 14bit negative numbers. Or at least I haven't worked out a way.
This is one of the (few) failings of the BC.
Single byte negatives are easy 
.minmax  $71  $8F
.default $80
.tx $F0 .... val ..$F7

You could add your left turn - right turn stuff, but you would get
$00 $7E, $00 $7F as well as $7F $07, $7F $06....
If we could make the max $FFFF (ie 16bit) we could do it, but the BC won't allow it.

All the best
Royce Craven

--- In bc2000@yahoogroups.com, "dean940@..." <dean940@...> wrote:
>
> Hello.
> Im new on this group.
> A few months finally i bought a bcr2000 and i have to say it's the best
> midi controller i ever had (totally recommended !!!).
> I use BC manager to edit its presets.
> I have a issue here, i hope somebody helpe me to solve.
> 
> Im tryin to control certain Sysex synth parameters via the TX Output
> feature but i cant do it properly, i mean not at 100%.
> The sysex strings i have created so far work right but only with 
> positive values on single byte of the sysex string but when i have to
> enter negative (not sure yet) values at 2 different bytes the things
> goes wrong.
> 
> On these sysex strings:
> The gain for a EQ band goes +15 positions from 0.00 to +15db (001-015)
> and goes negative -15 positions from 0.00 to -15db (127-113).
> This is the code i recorded from the synth i want to control:
> 
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $0F $F7    (+15db)
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $0E $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $0D $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $0C $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $0B $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $0A $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $09 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $08 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $07 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $06 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $05 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $04 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $03 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $02 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $01 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $00 $00 $F7    (0.0db)
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $7F $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $7E $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $7D $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $7C $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $7B $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $7A $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $79 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $78 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $77 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $76 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $75 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $74 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $73 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $72 $F7
> F0 $42 $30 $7A $41 $04 $00 $29 $00 $06 $7F $71 $F7    (-15db)
> 
> I've been tryin with many combinations of  .tx val7.13 , rel2s, relsign
> at negative areas but without results. I know i can make things with the
> .tx lfn and lfp but i think is not the right thing (not sure). Those
> 127s are making me crazy.
> I've learned a couple of very interesting things with the SecretBC.pdf
> —thanks R. Craven— but sometimes it gets complicated when bigger
> numbers or MSB/LSB comeout.
> Thanks in advance.
>