This should play if your Web browser has WebAssembly enabled (most do). Most examples will play unless they need to load files. The first time you click Play, Csound will spend a few seconds loading, then play. You can edit this code and replay it.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac ;;;realtime audio out ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o line.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 44100 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 instr 1 kp = p6 ;choose between expon or line if (kp == 0) then kpitch expon p4, p3, p5 elseif (kp == 1) then kpitch line p4, p3, p5 endif asig vco2 .6, kpitch outs asig, asig endin </CsInstruments> <CsScore> i 1 0 2 300 600 0 ;if p6=0 then expon is used i 1 3 2 300 600 1 ;if p6=1 then line is used i 1 6 2 600 1200 0 i 1 9 2 600 1200 1 i 1 12 2 1200 2400 0 i 1 15 2 1200 2400 1 i 1 18 2 2400 30 0 i 1 21 2 2400 30 1 e </CsScore> </CsoundSynthesizer>