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 pvshift.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 instr 1 ishift = p4 ; shift amount in Hz ilowest = p5 ; lowest frequency to be shifted ikeepform = p6 ; 0=no formant keeping, 1=keep by amps, 2=keep by spectral envelope ifftsize = 1024 ioverlap = ifftsize / 4 iwinsize = ifftsize iwinshape = 1 ; von-Hann window Sfile = "fox.wav" ain soundin Sfile fftin pvsanal ain, ifftsize, ioverlap, iwinsize, iwinshape; fft-analysis of file fshift pvshift fftin, ishift, ilowest, ikeepform; shift frequencies aout pvsynth fshift; resynthesize outs aout, aout endin </CsInstruments> <CsScore> i 1 0 2.757 0 0 0; no shift at all i 1 3 2.757 100 0 0; shift all frequencies by 100 Hz i 1 6 2.757 200 0 0; by 200 Hz i 1 9 2.757 200 0 1; keep formants by method 1 i 1 12 2.757 200 0 2; by method 2 i 1 15 2.757 200 1000 0; shift by 200 Hz but just above 1000 Hz i 1 18 2.757 1000 500 0; shift by 1000 Hz above 500 Hz i 1 21 2.757 1000 300 0; above 300 Hz e </CsScore> </CsoundSynthesizer>