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 ; For Non-realtime ouput leave only the line below: ; -o tab.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 = 2205 ; nchnls = 1 0dbfs = 1 instr 1 ;;; Give a value to the increment kmax = 256 knorm tabsum 1, 0, kmax gkinc = knorm/10 endin instr 2 kmax = 256 kx = rnd(kmax) krnd tabsum 1, 0, kx knorm tabsum 1, 0, kmax kvar = krnd / knorm ;;; now n [0,1] range asig oscil kvar, p4, 2 out asig ;;; Make randomness give 1 more often kc tab 0, 1 tablew kc+gkinc, 0, 1 endin </CsInstruments> <CsScore> f1 0 256 21 1 f2 0 4096 10 1 i1 0 0.1 i2 0.1 3 440 e </CsScore> </CsoundSynthesizer>