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> -odac -d </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 0dbfs = 1 // three different inputs instr 1 alp = diskin:a("fox.wav",1,0,1)/3 ahp rand p4/3 abp vco2 p4,100 af expon 100,p3,10000 a3 spf alp,ahp,abp,af,0.707 out a3 a1 = 0 endin // band-reject instr 2 a0 init 0 anoi rand p4 af expon 100,p3,10000 as spf anoi,anoi,a0,af,0.3 out as endin // self-oscillation instr 3 a0 init 0 anoi rand p4 af expon 100,p3,10000 as spf anoi,a0,a0,af,0 out as endin </CsInstruments> <CsScore> i1 0 10 0.2 i2 10 10 0.5 i3 20 10 0.004 </CsScore> </CsoundSynthesizer>