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 ;;;realtime audio out ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o cpumeter.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 = 1 0dbfs = 1 instr 1 ;cpu metering; stop when too large k0 cpumeter 0.1 printk2 k0 if k0>70 then event "i", 3, 0.1, 1 endif endin instr 2 event_i "i", 2, 1, 1000 asig oscil 0.2, 440, 1 out asig endin instr 3 exitnow endin f 1 0 32768 10 1 ; sine wave i 1 0 1000 i 2 0 1000 e