Reinitialize instruments in real time

 In the following code, we have a control variable used to star reproducing a sample (if gkControl is 1) and stop reproducing if gkControl is 2 here is where we want to reinitialize the state of the opcode diskin or others like pluck, line, linen, etc. How can we do that?


<CsoundSynthesizer>
<CsOptions>

   -o dac -+rtaudio=alsa

</CsOptions>

<CsInstruments>
   sr = 44100
   kr = 4410
   ksmps = 10
   nchnls = 2
   
   gkcontrol    init 0
   
   instr 1
       gkcontrol    chnget    "sample"
       
       if gkcontrol == 1 then
           a1,a2    diskin    "rep1.wav", 1,    0,    1,    0,    100
           outs a1, a2
       endif
       if gkcontrol == 2 then
           ;Reiniciar
       endif
   endin
   
   instr 2
       gkcontrol    =    p4
       
       printk2    gkcontrol
       
   endin



</CsInstruments>

<CsScore>

;reproduccion todos los instrumentos

i1    0    100
i2    0    50    1
i2    50  50    2  

</CsScore>

</CsoundSynthesizer>