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 ; Audio out Audio in -odac -iadc ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o ziwm.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; Initialize the global variables. ; sr = 44100 ; kr = 4410 ; ksmps = 10 ; nchnls = 1 ; Initialize the ZAK space. ; Create 1 a-rate variable and 1 k-rate variable. zakinit 1, 1 ; Instrument #1 -- a simple instrument. instr 1 ; Add 20.5 to zk variable #1. ziwm 20.5, 1 endin ; Instrument #2 -- another simple instrument. instr 2 ; Add 15.25 to zk variable #1. ziwm 15.25, 1 endin ; Instrument #3 -- prints out zk variable #1. instr 3 ; Read zk variable #1 at i-rate. i1 zir 1 ; Print out the value of zk variable #1. ; It should be 35.75 (20.5 + 15.25) print i1 endin </CsInstruments> <CsScore> ; Play Instrument #1 for one second. i 1 0 1 ; Play Instrument #2 for one second. i 2 0 1 ; Play Instrument #3 for one second. i 3 0 1 e </CsScore> </CsoundSynthesizer>