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 randomi.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 seed 0 ; Instrument #1. instr 1 ; Choose a random frequency between 220 and 440. ; Generate new random numbers at 10 Hz. kmin init 220 kmax init 440 kcps init 10 imode = p4 ifstval = p5 printf_i "\nMode: %d\n", 1, imode k1 randomi kmin, kmax, kcps, imode, ifstval printks "k1 = %f\n", 0.1, k1 endin </CsInstruments> <CsScore> ; Play Instrument #1 for one second. ; each time with a different mode. i 1 0 1 i 1 1 1 1 i 1 2 1 2 330 i 1 3 1 3 e </CsScore> </CsoundSynthesizer>