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 -B441 -b441 </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr= 44100 ; ksmps=10 ; nchnls=2 gilen init 32 gitable1 ftgen 0, 0, gilen, 10, 1 gitable2 ftgen 0, 0, gilen, 10, 1 gitable3 ftgen 0, 0, gilen, -7, 30, gilen, 35 gitable4 ftgen 0, 0, gilen, -7, 400, gilen, 450 gitable5 ftgen 0, 0, gilen, -7, 5000, gilen, 5500 instr 1 vcopy gitable2, gitable1, gilen turnoff endin instr 2 vlinseg gitable2, 16, gitable3, 2, gitable4, 2, gitable5 endin instr 3 kcount init 0 if kcount < 16 then kval table kcount, gitable2 printk 0,kval kcount = kcount +1 else turnoff endif endin </CsInstruments> <CsScore> i1 0 1 s i2 0 10 i3 0 1 i3 1 1 i3 1.5 1 i3 2 1 i3 2.5 1 i3 3 1 i3 3.5 1 i3 4 1 i3 4.5 1 </CsScore> </CsoundSynthesizer>