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 gensone.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 ; simple oscillator with loudness correction. kcps = cpspch(p4) kenv linseg 0, p3*0.25, 1, p3*0.75, 0 ;amplitude envelope kamp tablei 16384 *kenv, 2 asig oscil kamp, kcps, 1 outs asig, asig endin instr 2 ;neutral oscillator to compare with kcps = cpspch(p4) kenv linseg 0, p3*0.25, 1, p3*0.75, 0 ;amplitude envelope asig oscil kenv, kcps, 1 outs asig, asig endin </CsInstruments> <CsScore> f 1 0 16384 10 1 ;sine wave f 2 0 16385 "sone" 0 32000 32000 0 s f 0 1 ;1 second of silence before we start... s i 1 0 2 7.00 i 1 + . 7.01 i 1 + . 8.02 i 1 + . 8.03 s i 2 0 2 7.00 i 2 + . 7.01 i 2 + . 8.02 i 2 + . 8.03 e </CsScore> </CsoundSynthesizer>