<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ; Audio out Audio in -odac -iadc ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o checkbox.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 10 nchnls = 2 instr 1 ; Get the value from the checkbox. k1 checkbox 1 ; If the checkbox is selected then k2=440, otherwise k2=880. k2 = (k1 == 0 ? 440 : 880) a1 oscil 10000, k2, 1 outs a1, a1 kq button 1 if kq = 1 then exitnow endif endin </CsInstruments> <CsScore> ; sine wave. f 1 0 32768 10 1 i 1 0 1000 e </CsScore> </CsoundSynthesizer>