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 -odac -iadc ;;;RT audio I/O </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr= 48000 ; ksmps=128 ; nchnls=2 ; Example by Hector Centeno and Andres Cabrera 2007 ; giSWMtab4 ftgen 0, 0, 513, 21, 10, 1, .3 ; giSWMtab4M ftgen 0, 0, 64, 7, 1, 50, 1 FLpanel "Snapshots", 530, 190, 40, 410, 3 FLcolor 100, 118 ,140 ivalSM1 FLvalue "", 70, 20, 270, 20 gksliderA, gislidSM1 FLslider "Slider", -4, 4, 0, 3, ivalSM1, 250, 20, 20, 20 itext1 FLbox "store", 1, 1, 14, 50, 25, 355, 15 itext2 FLbox "load", 1, 1, 14, 50, 25, 415, 15 gksnap, ibuttn1 FLbutton "1", 1, 0, 11, 25, 25, 364, 45, 0, 3, 0, 3, 1 gksnap, ibuttn2 FLbutton "2", 1, 0, 11, 25, 25, 364, 75, 0, 3, 0, 3, 2 gksnap, ibuttn3 FLbutton "3", 1, 0, 11, 25, 25, 364, 105, 0, 3, 0, 3, 3 gksnap, ibuttn4 FLbutton "4", 1, 0, 11, 25, 25, 364, 135, 0, 3, 0, 3, 4 gkload, ibuttn1 FLbutton "1", 1, 0, 11, 25, 25, 424, 45, 0, 4, 0, 3, 1 gkload, ibuttn2 FLbutton "2", 1, 0, 11, 25, 25, 424, 75, 0, 4, 0, 3, 2 gkload, ibuttn3 FLbutton "3", 1, 0, 11, 25, 25, 424, 105, 0, 4, 0, 3, 3 gkload, ibuttn4 FLbutton "4", 1, 0, 11, 25, 25, 424, 135, 0, 4, 0, 3, 4 ivalSM2 FLvalue "", 70, 20, 270, 80 gkknobA, gislidSM2 FLknob "Knob", -4, 4, 0, 3, ivalSM2, 60, 120, 60 FLpanelEnd FLsetVal_i 1, gislidSM1 FLsetVal_i 1, gislidSM2 FLrun instr 1 endin instr 3 ; Save snapshot index init 0 ipstno = p4 Sfile sprintf "snapshot_simple.%d.snap", ipstno inumsnap, inumval FLsetsnap index ;, -1, igroup FLsavesnap Sfile endin instr 4 ;Load snapshot index init 0 ipstno = p4 Sfile sprintf "snapshot_simple.%d.snap", ipstno FLloadsnap Sfile inumload FLgetsnap index ;, igroup endin </CsInstruments> <CsScore> f 0 3600 e </CsScore> </CsoundSynthesizer>