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 ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o vdelayxw.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 ims = .5 ;maximum delay time in seconds iws = 1024 ;best quality adl = .5 ;delay time asig diskin2 "flute.aiff", .5, 0, 1 ;loop flute.aiff at half speed a2 poscil3 .2, .1, 1 ;make an LFO, 1 cycle per 2 seconds adl = a2 + ims/2 ;offset the LFO so that it is positive aout vdelayxw asig, adl, ims, iws ;use the LFO to control delay time outs aout, aout endin </CsInstruments> <CsScore> f1 0 8192 10 1 i 1 0 10 e </CsScore> </CsoundSynthesizer>