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 RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o randi.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 = 2 0dbfs = 1 instr 1 ;same values every time krnd randi 100, 10 printk .5, krnd ; look aout oscili 0.8, 440+krnd, 1 ; & listen outs aout, aout endin instr 2 ;different values every time krnd randi 100, 10, 10 ; seed from system clock printk .5, krnd ; look aout oscili 0.8, 440+krnd, 1 ; & listen outs aout, aout endin </CsInstruments> <CsScore> f 1 0 16384 10 1 ;sine wave. i 1 0 1 i 2 2 1 e </CsScore> </CsoundSynthesizer>