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 No messages -odac -iadc -d ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o vcopy.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr= 44100 ; kr=4410 ; ksmps=10 ; nchnls=2 instr 1 ;table playback ar lposcil 1, 1, 0, 262144, 1 outs ar,ar endin instr 2 vcopy 2, 1, 20000 ;copy vector from sample to empty table vmult 5, 20000, 262144 ;scale noise to make it audible vcopy 1, 5, 20000 ;put noise into sample turnoff endin instr 3 vcopy 1, 2, 20000 ;put original information back in turnoff endin </CsInstruments> <CsScore> f1 0 262144 -1 "beats.wav" 0 4 0 f2 0 262144 2 0 f5 0 262144 21 3 30000 i1 0 4 i2 3 1 s i1 0 4 i3 3 1 s i1 0 4 </CsScore> </CsoundSynthesizer>