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 midi in ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o foutir.wav -W ;;; for file output any platform ; sr = 44100 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 gihand fiopen "foutir.sco", 0 instr 1 ; play virtual midi keyboard inot notnum ;just for priting on screen icps cpsmidi iamp ampmidi 1 foutir gihand, 0, 1, icps, iamp prints "WRITING:\n" prints "note = %f,velocity = %f\n", icps, iamp ;prints them ficlose gihand asig pluck iamp, icps, 1000, 0, 1 outs asig, asig endin f 0 10 e