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 ;;;RT audio out ;-iadc ;;;uncomment -iadc if RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o denorm.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; slightly simplified example from Istvan Varga 2006 ; sr = 44100 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 garvb init 0 instr 1 a1 oscils 0.6, 440, 0 a2 linsegr 0, 0.005, 1, 3600, 1, 0.08, 0 a1 = a1 * a2 vincr garvb, a1 outs a1, a1 endin instr 99 ;"Always on" denorm garvb aL, aR reverbsc garvb * 0.5, garvb * 0.5, 0.92, 10000 clear garvb outs aL, aR endin </CsInstruments> <CsScore> i 99 0 -1 ;held by a negative p3, means "always on" i 1 0 0.5 i 1 4 0.5 e 8 ;8 extra seconds after the performance </CsScore> </CsoundSynthesizer>