David Schuyeteneer wrote:
> 
> Is there a way to, for example adding reverb, to an instrument 
> based on TRUE / FALSE events ?

Apparently my mail server didn't want to send this during the
weekend. Here goes again.

Look at the if...kgoto opcodes in the manual (under the entry 
PROGRAM CONTROL STATEMENTS). In practise, you will have to
make a jump inside your instrument. Your funky imagination will
have to stretch towards:

    apeak = awhatever  ; Your sound

    itest = 3300

        ; You can only do gotos at i- or k-rate, so 
        ; apeak must be downsampled, perhaps like this.
    kpeak downsamp apeak, ksmps
        ; now test Kpeak & do conditional processing on Apeak
    if kpeak < itest kgoto noverb
    gareverbsig = gareverbsig + apeak
    kgoto continue   ; skip non-reverb processing (if any)

noverb:              ; This is a label, ie a jump target
      ; do non-reverb processing (if any)
continue:
      ; continue instr processing here


But if you are anyway doing three separate reson filters, 
couldn't you process just one of them directly, like:

instr 10
    anoise rand 10000
    aband1 reson anoise, 110, 10
    aband2 reson anoise, 330, 20
    aband3 reson anoise, 3300, 50

    gareverbsig = gareverbsig + aband3
 
    aamp linseg 20000, p3, 0     ; (whatever)
    anoise balance (aband1 + aband2 + aband3), aamp
        out anoise   ; (perhaps)
endin

?

And again, every time you have a problem with the Csound language,
you must include full orc and sco files (preferably edited to the 
minimal version which still causes the problem) - else it will 
be much harder to help.

Cheers,

        re