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 -F Anna.mid ;;;realtime audio out and midi file input ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o miditempo.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 massign 0, 1 ; make sure that all channels pgmassign 0, 1 ; and programs are assigned to test instr instr 1 ksig miditempo prints "miditempo = %d\\n", ksig icps cpsmidi ; convert midi note to pitch kenv madsr 0.1, 0, 0.8, 0.3 asig pluck kenv*.15, icps, icps, 1, 1 ;low volume outs asig, asig endin f 0 200 ;stay active for 120 seconds f 1 0 4096 10 1 ;sine e