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 No messages -odac -iadc -d ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o zacl.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 ; ksmps = 32 ; nchnls = 1 0dbfs = 1 ; Initialize the ZAK space. ; Create 1 a-rate variable and 1 k-rate variable. zakinit 1, 1 ; Instrument #1 -- a simple waveform. instr 1 ; Generate a simple sine waveform. asin oscili 0.2, 440 ; Declick asin *= linsegr(0, 0.05, 1, 0.05, 0) ; Send the sine waveform to za variable #1. zaw asin, 1 endin ; Instrument #2 -- generates audio output. instr 2 ; Send za location #1 to channel 1 a1 zar 1 out a1 ; Clear the za variables, get them ready for ; another pass. zacl 0, 1 endin </CsInstruments> <CsScore> ; Play Instrument #1 for one second. i 1 0 1 ; Play Instrument #2 until end of performance i 2 0 -1 e 1.5 </CsScore> </CsoundSynthesizer>