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 ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o pvsbandwidth.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 = 32 ; nchnls = 2 0dbfs = 1 ;; example written by joachim heintz 2009 giSine ftgen 0, 0, 4096, 10, 1 instr 1 irefrtm = p4; time for generating new values for the spectral centroid ifftsize = 1024 ioverlap = ifftsize / 4 iwinsize = ifftsize iwinshape = 1 ; von-Hann window ;Sfile = "flute-C-octave0.wav" Sfile = "fox.wav" ain soundin Sfile fftin pvsanal ain, ifftsize, ioverlap, iwinsize, iwinshape; fft-analysis of the audio-signal ktrig metro 1 / irefrtm if ktrig == 1 then kcenter pvscent fftin; spectral center kbw pvsbandwidth fftin; spectral center printks2 "--**spectral center frequency = %f\n", kbw endif aout vco2 .2, 130 asig butterbp aout,kcenter,kbw outs asig, asig endin </CsInstruments> <CsScore> i 1 0 2.757 .3 i 1 3 2.757 .05 i 1 6 2.757 .005 i 1 9 2.757 .001 e </CsScore> </CsoundSynthesizer>