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.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ; Audio out Audio in -odac -iadc ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o ftconv.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 48000 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 garvb init 0 gaW init 0 gaX init 0 gaY init 0 itmp ftgen 1, 0, 64, -2, 2, 40, -1, -1, -1, 123, \ 1, 13.000, 0.05, 0.85, 20000.0, 0.0, 0.50, 2, \ 1, 2.000, 0.05, 0.85, 20000.0, 0.0, 0.25, 2, \ 1, 16.000, 0.05, 0.85, 20000.0, 0.0, 0.35, 2, \ 1, 9.000, 0.05, 0.85, 20000.0, 0.0, 0.35, 2, \ 1, 12.000, 0.05, 0.85, 20000.0, 0.0, 0.35, 2, \ 1, 8.000, 0.05, 0.85, 20000.0, 0.0, 0.35, 2 itmp ftgen 2, 0, 262144, -2, 0 spat3dt 2, -0.2, 1, 0, 1, 1, 2, 0.005 itmp ftgen 3, 0, 262144, -52, 3, 2, 0, 4, 2, 1, 4, 2, 2, 4 instr 1 a1 vco2 1, 440, 10 kfrq port 100, 0.008, 20000 a1 butterlp a1, kfrq a2 linseg 0, 0.003, 1, 0.01, 0.7, 0.005, 0, 1, 0 a1 = a1 * a2 * 2 denorm a1 vincr garvb, a1 aw, ax, ay, az spat3di a1, p4, p5, p6, 1, 1, 2 vincr gaW, aw vincr gaX, ax vincr gaY, ay endin instr 2 denorm garvb ; skip as many samples as possible without truncating the IR arW, arX, arY ftconv garvb, 3, 2048, 2048, (65536 - 2048) aW = gaW + arW aX = gaX + arX aY = gaY + arY garvb = 0 gaW = 0 gaX = 0 gaY = 0 aWre, aWim hilbert aW aXre, aXim hilbert aX aYre, aYim hilbert aY aWXr = 0.0928*aXre + 0.4699*aWre aWXiYr = 0.2550*aXim - 0.1710*aWim + 0.3277*aYre aL = aWXr + aWXiYr aR = aWXr - aWXiYr outs aL, aR endin </CsInstruments> <CsScore> i 1 0 0.5 0.0 2.0 -0.8 i 1 1 0.5 1.4 1.4 -0.6 i 1 2 0.5 2.0 0.0 -0.4 i 1 3 0.5 1.4 -1.4 -0.2 i 1 4 0.5 0.0 -2.0 0.0 i 1 5 0.5 -1.4 -1.4 0.2 i 1 6 0.5 -2.0 0.0 0.4 i 1 7 0.5 -1.4 1.4 0.6 i 1 8 0.5 0.0 2.0 0.8 i 2 0 10 e </CsScore> </CsoundSynthesizer>