<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
; Audio out   Audio in    No messages
-odac           -iadc     -d     ;;;RT audio I/O
; For Non-realtime ouput leave only the line below:
; -o ihold.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1

; Instrument #1.
instr 1
  ; A simple oscillator with its note held indefinitely.
  a1 oscil 10000, 440, 1
  ihold

  ; If p4 equals 0, turn the note off.
  if (p4 == 0) kgoto offnow
    kgoto playit

offnow:
  ; Turn the note off now.
  turnoff

playit:
  ; Play the note.
  out a1
endin


</CsInstruments>
<CsScore>

; Table #1: an ordinary sine wave.
f 1 0 32768 10 1

; p4 = turn the note off (if it is equal to 0).
; Start playing Instrument #1.
i 1 0 1 1
; Turn Instrument #1 off after 3 seconds.
i 1 3 1 0
e


</CsScore>
</CsoundSynthesizer>