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 gtf.wav -W ;;; for file output any platform ; By Stefano Cucchi 2020 </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 kcps init cpspch(p4) asig1 vco2 0.5, kcps ; SOUND kfreq1 linseg p5, p3, p6 ; frequency filter 1 kfreq2 expseg p6, p3, p5 ; frequency filter 2 idecay = p7 ; keep it very small afilter1 gtf asig1, kfreq1, idecay ; SOUND - filter 1 afilter2 gtf asig1, kfreq2, idecay ; SOUND - filter 2 aref oscili 0.25, 440 ; AMPLITUDE reference afilter1 balance afilter1, aref ; compare filtered SOUND with reference afilter2 balance afilter2, aref ; ; compare filtered SOUND with reference outs afilter1, afilter2 endin </CsInstruments> <CsScore> i 1 0 5 6.00 200 12000 0.1 i 1 5 5 6.00 200 12000 0.01 e </CsScore> </CsoundSynthesizer>