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 ; For Non-realtime ouput leave only the line below: ; -o pwd.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; by tgrey - 2020 ; sr = 44100 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 seed 0 ;each time different seed instr 1 ;;get the working directory name Spwd pwd ;;generating a different filename each time csound renders itim date Stim dates itim Syear strsub Stim, 20, 24 Smonth strsub Stim, 4, 7 Sday strsub Stim, 8, 10 iday strtod Sday Shor strsub Stim, 11, 13 Smin strsub Stim, 14, 16 Ssec strsub Stim, 17, 19 Sfilnam sprintf "%s_%s_%02d_%s_%s_%s.wav", Syear, Smonth, iday, Shor,Smin, Ssec ;;rendering with random frequency, amp and pan, and writing to disk ifreq random 400, 1000 iamp random .1, 1 ipan random 0, 1 asin oscils iamp, ifreq, 0 aL, aR pan2 asin, ipan fout Sfilnam, 14, aL, aR outs aL, aR printf_i "File '%s' written to '%s'!\n", 1, Sfilnam, Spwd endin </CsInstruments> <CsScore> i 1 0 1 </CsScore> </CsoundSynthesizer>