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 RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o vlowres.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 instr 1 kamp init p4 asig vco2 kamp, 110 ;saw wave kfco line 30, p3, 300 ;vary the cutoff frequency from 30 to 300 Hz. kres = 20 ksep = p5 ;different resonance values iord = p6 ;and different number of filters aout vlowres asig, kfco, kres, iord, ksep aclp clip aout, 1, 1 ;avoid distortion outs aclp, aclp endin f 1 0 16384 10 1 ;sine s i 1 0 10 .1 5 2 ;compensate volume and i 1 + 10 .1 25 2 ;number of filters = 2 s i 1 0 10 .01 5 6 ;compensate volume and i 1 + 10 .04 15 6 ;number of filters = 6 e