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.
-odac -d ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 44100 ; ksmps = 64 ; nchnls = 1 0dbfs = 1 gifw ftgen 0,0,1024,20,2,1 instr 1 a1 diskin "fox.wav",1,0,1 kcfs[],krms,kerr,kcps lpcanal a1,1,128,1024,64,gifw if kcps > 180 then kcps = 180 endif a2 buzz 0dbfs, kcps, sr/(kcps*2), -1 a3 allpole a2*krms*kerr,kcfs a3 dcblock a3 out a3 endin i1 0 30