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.
; Select audio/midi flags here according to platform -odac -+rtmidi=virtual -M0 ;;;realtime audio out and realtime midi in ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ;-o fluidAllOut.wav -W ;;; for file output any platform ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 44100 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 giengine1 fluidEngine isfnum1 fluidLoad "sf_GMbank.sf2", giengine1, 1 fluidProgramSelect giengine1, 1, isfnum1, 0, 0 giengine2 fluidEngine ; soundfont path to manual/examples isfnum2 fluidLoad "22Bassoon.sf2", giengine2, 1 fluidProgramSelect giengine2, 1, isfnum2, 0, 70 instr 1 mididefault 60, p3 midinoteonkey p4, p5 ikey init p4 ivel init p5 fluidNote giengine1, 1, ikey, ivel endin instr 2 mididefault 60, p3 midinoteonkey p4, p5 ikey init p4 ivel init p5 fluidNote giengine2, 1, ikey, ivel endin instr 100 imvol init 7 ;amplify a bit asigl, asigr fluidAllOut outs asigl*imvol, asigr*imvol endin i 1 0 2 60 127 ;play one note on instr 1 i 2 2 2 60 127 ;play another note on instr 2 and... i 100 0 60 ;play virtual midi keyboard e