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 ; Audio out Audio in No messages -odac -iadc -d -M0 -Q1;;;RT audio I/O with MIDI in ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 44100 ; kr = 4410 ; ksmps = 10 ; nchnls = 2 ; Example by Giorgio Zucco 2007 FLpanel "outkpc",200,100,90,90;start of container gkpg, gihandle FLcount "Midi-Program change",0,127,1,5,1,152,40,16,23,-1 FLpanelEnd FLrun instr 1 ktrig changed gkpg outkpc ktrig,gkpg,0,127 endin ; Run instrument 1 for 60 seconds i 1 0 60