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 ; Audio out Audio in -odac ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o pvsbufread2.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 kcnt init 0 ifftsize = 2048 ihop = ifftsize/4 a1 diskin2 "beats.wav", 1, 0, 1 fsig1 pvsanal a1*.5, ifftsize, ihop, ifftsize, 1 ih, kt pvsbuffer fsig1, 2 fsig2 pvsbufread2 kt, ih, 1, 1 fsig3 pvsbufread2 kt, ih, 2, 2 a2 pvsynth fsig3 a3 pvsynth fsig2 outs a2, a3 endin </CsInstruments> <CsScore> f1 0 2048 -7 0 128 1.1 128 0.5 256 1.8 512 1.1 1024 0.1 f2 0 2048 -7 1 128 0.2 128 0.05 256 0.5 512 0.9 1024 0.1 i1 0 30 </CsScore> </CsoundSynthesizer>