<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 freeverb.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>
sr      =  44100
ksmps   =  32
nchnls  =  2
0dbfs   =  1

        instr 1
a1      vco2 0.75, 440, 10
kfrq    port 100, 0.008, 20000
a1      butterlp a1, kfrq
a2      linseg 0, 0.003, 1, 0.01, 0.7, 0.005, 0, 1, 0
a1      =  a1 * a2
        denorm a1
aL, aR  freeverb a1, a1, 0.9, 0.35, sr, 0
        outs a1 + aL, a1 + aR
        endin

</CsInstruments>
<CsScore>
i 1 0 5
e

</CsScore>
</CsoundSynthesizer>