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 -+rtmidi=virtual -M0 ;;;realtime audio out and realtime midi in ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o expsegr.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 icps cpsmidi iamp ampmidi .3 kenv expsegr 1, .05, 0.5, 1, .01 asig pluck kenv, icps, 200, 1, 1 outs asig, asig endin </CsInstruments> <CsScore> f 1 0 4096 10 1 ;sine wave f0 30 ;runs 30 seconds e </CsScore> </CsoundSynthesizer>