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 ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o gen12.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ;example from the Csound Book, page 87 ; sr = 44100 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 instr 1 idur = p3 iamp = p4 icarfrq = p5 imodfrq = p6 aenv expseg .01, idur*.1, iamp, idur*.8, iamp*.75, idur*.1, .01 i1 = p7*imodfrq ;p7=modulation index start i2 = p8*imodfrq ;p8=modulation index end adev line i1, idur, i2 ;modulation frequency aindex line p7, idur, p8 ;modulation index ar linseg 1, .1, p9, p3-.2, p10, .1, 1 ; r value envelope: p9-p10 =exp. partial strength parameter start and end amp1 = (aindex*(ar+(1/ar)))/2 afmod oscili amp1, imodfrq, 1 ;FM modulator (sine) atab = (aindex*(ar-(1/ar)))/2 ;index to table alook tablei atab, 37 ;table lookup to GEN12 aamod oscili atab, adev, 2 ;am modulator (cosine) aamod = (exp(alook+aamod))*aenv acar oscili aamod, afmod+icarfrq, 1 ;AFM (carrier) asig balance acar, aenv outs asig, asig endin </CsInstruments> <CsScore> f 1 0 8192 10 1 f 2 0 8192 9 1 1 90 f37 0 1024 -12 40 ;Bessel function-defined from 0 to 40 i 1 0 2 .2 800 800 1 6 .1 2 i 1 + . . 1900 147 8 1 4 .2 i 1 . . . 1100 380 2 9 .5 2 i 1 . 10 . 100 100 11 3 .2 5 s i 1 0 1 .1 200 100 1 6 .1 2 i 1 + . < < < < < < < i 1 + . . < < < < < < i 1 + . . < < < < < < i 1 + . . < < < < < < i 1 + . . < < < < < < i 1 + . . < < < < < < i 1 + 10 .2 800 800 9 1 .9 6 s i 1 0 11 .25 50 51 1 6 .1 2 i 1 1 9 .05 700 401 1 6 .1 2 i 1 2 8 . 900 147 8 1 4 .2 i 1 3 7 . 1100 381 2 9 .5 2 i 1 4 6 . 200 102 11 3 .2 5 i 1 5 6 . 800 803 9 1 .9 6 e </CsScore> </CsoundSynthesizer>