It's simple, we see an example

<CsoundSynthesizer>
<CsInstruments>
instr signal
prints "signal\n"
endin

instr pvsdelay
prints "delay\n"
endin

instr reverbx
prints "reverb\n"
endin

</CsInstruments>
<CsScore>
i1 "signal" 0 1
</CsScore>
</CsoundSynthesizer>


Which are the numbers of the instruments ?
To get the answer we start csound with the `-v' (verbose) option
and we look for the lines "uses instrument"

> csound -v test.csd 2>&1|grep 'uses instrument'
instr signal uses instrument number 1
instr pvsdelay uses instrument number 2
instr reverbx uses instrument number 3

wow, incresing numbers beginning from 1. Try

...
i1 0 1
i2 1 1
i3 2 1
...

and the result is

...
signal
B  0.000 ..  1.000 T  1.000 TT  1.000 M:      0.0
new alloc for instr pvsdelay:
delay
B  1.000 ..  2.000 T  2.000 TT  2.000 M:      0.0
new alloc for instr reverbx:
reverb
B  2.000 ..  3.000 T  3.000 TT  3.000 M:      0.0
...

It works! Giorgio, you can now modify your csd file with

;; if "signal" is the first instr
#define SIGNAL  #1#
#define TURNOFF #123#

gkOnOff init $SIGNAL
FLpanel "Live electronics GUI",750,400,100,100,1,-1,-1
gkOnOff,ihOnOff FLbutton "On/Off",$SIGNAL,$TURNOFF,22,100,30,630,360,0,gkOnOff,0,-1
FLpanelEnd
FLrun

...

instr $TURNOFF
turnoff2 $SIGNAL,0,0
turnoff
endin

...


tito

On Sat, Dec 17, 2011 at 03:21:19AM -0800, Giorgio Zucco wrote:
> Hi,I'm making a gui for a live performance in which I make a great use of
> connect opcode, I would like a simple On / Off button to activate the GUI
> with turnoff,for example :
> 
> gkOnOff,ihOnOff	FLbutton	"On/Off",1,0,22,100,30,630,320,0,1,0,-1
> 
> the ending code : 0,1,0,-1 not take as an argument named instrument but
> numbers,some other ideas?thanks!
> 
> Giorgio


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