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 zkmod.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 = 2 ; Initialize the ZAK space. ; Create 2 a-rate variables and 2 k-rate variables. zakinit 2, 2 ; Instrument #1 -- a signal with jitter. instr 1 ; Generate a k-rate signal goes from 30 to 2,000. kline line 30, p3, 2000 ; Add the signal into zk variable #1. zkw kline, 1 endin ; Instrument #2 -- generates audio output. instr 2 ; Create a k-rate signal modulated the jitter opcode. kamp init 20 kcpsmin init 40 kcpsmax init 60 kjtr jitter kamp, kcpsmin, kcpsmax ; Get the frequency values from zk variable #1. kfreq zkr 1 ; Add the the frequency values in zk variable #1 to ; the jitter signal. kjfreq zkmod kjtr, 1 ; Use a simple sine waveform for the left speaker. aleft oscil 20000, kfreq, 1 ; Use a sine waveform with jitter for the right speaker. aright oscil 20000, kjfreq, 1 ; Generate the audio output. outs aleft, aright ; Clear the zk variables, prepare them for ; another pass. zkcl 0, 2 endin </CsInstruments> <CsScore> ; Table #1, a sine wave. f 1 0 16384 10 1 ; Play Instrument #1 for 2 seconds. i 1 0 2 ; Play Instrument #2 for 2 seconds. i 2 0 2 e </CsScore> </CsoundSynthesizer>