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 FLscroll.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; Demonstration of the flscroll opcode which enables ; the use of widget sizes and placings beyond the ; dimensions of the containing panel ; sr = 44100 ; kr = 441 ; ksmps = 100 ; nchnls = 1 FLpanel "Text Box", 420, 200, 50, 50 iwidth = 420 iheight = 200 ix = 0 iy = 0 FLscroll iwidth, iheight, ix, iy ih3 FLbox "DRAG THE SCROLL BAR TO THE RIGHT IN ORDER TO READ THE REST OF THIS TEXT!", 1, 10, 20, 870, 30, 10, 100 FLscrollEnd ; End of panel contents FLpanelEnd ; Run the widget thread! FLrun instr 1 endin </CsInstruments> <CsScore> ; 'Dummy' score event of 1 hour. f 0 3600 e </CsScore> </CsoundSynthesizer>