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 ; Audio out Audio in No messages -odac -iadc -d ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o avarset.wav -W ;;; for file output any platform ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr= 44100 ; ksmps=1 ; nchnls=2 instr 1 ; Sine Wave ifreq = (p4 > 15 ? p4 : cpspch(p4)) iamp = ampdb(p5) kenv ad; sr 0.1, 0.05, .9, 0.2 aout init 0 ksampnum init 0 kcount = 0 iperiod = sr / ifreq i2pi = 3.14159 * 2 loopStart: kphase = (ksampnum % iperiod) / iperiod knewval = sin(kphase * i2pi) vaset knewval, kcount,aout ksampnum = ksampnum + 1 loop_lt kcount, 1, ksmps, loopStart aout = aout * iamp * kenv outs aout, aout endin i1 0.0 2 440 80 e