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 exp.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 gisine ftgen 0, 0, 2^10, 10, 1 ;table for a sine wave instr 1 ;master instrument koct linseg 6, p3, 12 ; octave register straight rising from 6 to 12 kexp linseg 0, p3/3, 5, p3/3, 5, p3/3, 0 ;exponent goes from 0 to 5 and back kdens = exp(kexp) ;density is e to the power of kexp printks "Generated events per second: %d\n", 1, kdens ktrig metro kdens ;trigger single notes in kdens frequency if ktrig == 1 then ;call instr 10 for 1/kdens duration, .5 amplitude and koct register event "i", 10, 0, 1/kdens, .5, koct endif endin instr 10 ;performs one tone ioct rnd31 1, 0 ;random deviation maximum one octave plus/minus aenv transeg p4, p3, -6, 0 ;fast decaying envelope for p4 amplitude asin poscil aenv, cpsoct(p5+ioct), gisine ;sine for p5 octave register plus random deviation outs asin, asin endin </CsInstruments> <CsScore> i 1 0 30 e </CsScore> </CsoundSynthesizer>