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 outq.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 44100 ; ksmps = 32 ; nchnls = 4 0dbfs = 1 instr 1 asig vco2 .01, 110 ; sawtooth waveform at low volume ;filter the first channel kcut1 line 60, p3, 300 ; Vary cutoff frequency kresonance1 = 3 inumlayer1 = 3 asig1 lowresx asig, kcut1, kresonance1, inumlayer1 ;filter the second channel kcut2 line 300, p3, 60 ; Vary cutoff frequency kresonance2 = 3 inumlayer2 = 3 asig2 lowresx asig, kcut2, kresonance2, inumlayer2 ;filter the third channel kcut3 line 30, p3, 100; Vary cutoff frequency kresonance3 = 6 inumlayer3 = 3 asig3 lowresx asig, kcut3, kresonance3, inumlayer3 asig3 = asig3*.1 ; lower volume ;filter the fourth channel kcut4 line 100, p3, 30; Vary cutoff frequency kresonance4 = 6 inumlayer4 = 3 asig4 lowresx asig, kcut4, kresonance4, inumlayer4 asig4 = asig4*.1 ; lower volume outq asig1, asig2, asig3, asig4; output channels 1, 2, 3 & 4 endin </CsInstruments> <CsScore> i 1 0 5 e </CsScore> </CsoundSynthesizer>