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 No messages -odac -iadc -d ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o FLsetcolor.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; Using the opcode flsetcolor to change from the ; default colours for widgets ; sr = 44100 ; kr = 441 ; ksmps = 100 ; nchnls = 1 FLpanel "Coloured Sliders", 900, 360, 50, 50 gkfreq, ihandle FLslider "A Red Slider", 200, 5000, -1, 5, -1, 750, 30, 85, 50 ired1 = 255 igreen1 = 0 iblue1 = 0 FLsetColor ired1, igreen1, iblue1, ihandle gkfreq, ihandle FLslider "A Green Slider", 200, 5000, -1, 5, -1, 750, 30, 85, 150 ired1 = 0 igreen1 = 255 iblue1 = 0 FLsetColor ired1, igreen1, iblue1, ihandle gkfreq, ihandle FLslider "A Blue Slider", 200, 5000, -1, 5, -1, 750, 30, 85, 250 ired1 = 0 igreen1 = 0 iblue1 = 255 FLsetColor ired1, igreen1, iblue1, ihandle ; End of panel contents FLpanelEnd ; Run the widget thread! FLrun instr 1 endin </CsInstruments> <CsScore> ; 'Dummy' score event for 1 hour. f 0 3600 e </CsScore> </CsoundSynthesizer>