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 ;;;RT audio out ; For Non-realtime ouput leave only the line below: ; -o granule.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; additions by Menno Knevel 2022 ; sr = 44100 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 instr 1 kenv linseg 0,0.5,1,(p3-0.5),1 ; envelope with attack time of .5 seconds iamp = p4 ivoice = p5 iratio = p6 imode = p7 ithd = p8 ifn = p9 ipshift = p10 igskip = p11 igskipos = p12 ilenght = p13 kgap = p14 igapos = p15 kgsize = p16 igsize_os = p17 iatt = p18 idec = p19 iseed = p20 ipitch1 = p21 ipitch2 = p22 ipitch3 = p23 ipitch4 = p24 a1 granule iamp*kenv, ivoice, iratio, imode, ithd, ifn, ipshift ,igskip ,igskipos , ilenght, kgap ,igapos, kgsize, igsize_os, iatt, idec, iseed, ipitch1, ipitch2, ipitch3, ipitch4 a2 granule iamp*kenv, ivoice, iratio, imode, ithd, ifn, ipshift ,igskip ,igskipos , ilenght, kgap ,igapos, kgsize, igsize_os, iatt, idec, iseed+0.17, ipitch1, ipitch2, ipitch3, ipitch4 outs a1,a2 endin </CsInstruments> <CsScore> f1 0 0 1 "marimba.aif" 0 0 0 f2 0 0 1 "fox.wav" 0 0 0 ; both samples are played back 2 x slower ; p4 p5 p6 p7 p8 p9 p10 p11 p12 p13 p14 p15 p16 p17 p18 p19 [p20 p21 p22 p23 p24] i1 0 10 .25 64 1 0 0 1 4 0 0.005 1 0.01 0 0.02 50 25 25 0.39 1 1.42 0.29 2 ;part of marimba i1 11 20 .37 9 1 0 0 2 0 0 0.005 1 0.01 0 0.02 50 25 25 0.39 1 1.42 0.29 2 ;part of fox e </CsScore> </CsoundSynthesizer>