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 -Q1 -M0 ;;;realtime audio out and midi in and out ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o outkat.wav -W ;;; for file output any platform ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 44100 ; ksmps = 10 ; nchnls = 2 instr 1 ikey notnum ivel veloc kvib linseg 100, .5, 120 ;vary aftertouch in .5 second kvbr = int(kvib) ;whole numbers only outkat 1, kvbr, 0, 127 ;assign aftertouch on printk2 kvbr ;external synth for example to midion 1, ikey, ivel ;change depth of filter modulation endin f0 30 ;play for 30 seconds e