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 maxabs.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 k1 oscili 1, 10.0, 1 ;combine 3 sinusses k2 oscili 1, 1.0, 1 ;at different rates k3 oscili 1, 3.0, 1 kmax maxabs k1, k2, k3 kmax = kmax*250 ;scale kmax printk2 kmax ;check the values aout vco2 .5, 220, 6 ;sawtooth asig moogvcf2 aout, 600+kmax, .5 ;change filter above 600 Hz outs asig, asig endin </CsInstruments> <CsScore> f1 0 32768 10 1 i1 0 5 e </CsScore> </CsoundSynthesizer>