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 maxabsaccum.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 ;saw asig vco2 .2, p4 outs asig, asig gasaw = asig endin instr 2 ;sine aout poscil .3, p4, 1 outs aout, aout gasin = aout endin instr 10 accum init 0 maxabsaccum accum, gasaw + gasin ;saw and sine accumulated accum dcblock2 accum ;get rid of DC outs accum, accum clear accum endin </CsInstruments> <CsScore> f 1 0 4096 10 1 ;sine wave i 1 0 7 330 i 2 3 3 440 i 1 10 7 330 ;same notes but without maxabsaccum, for comparison i 2 13 3 440 i 10 0 6 ;accumulation note stops after 6 seconds e </CsScore> </CsoundSynthesizer>