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> </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 48000 ; ksmps = 32 ; nchnls = 1 instr scan a0 init 0 irate = .01 kpos line 0, p3, 128 ;kpos randh abs(128), 3 ; scanu init, irate, ifndisplace, ifnmass, ifnmatrix, ifncentr, ifndamp, kmass, ; kmtrxstiff, kcentr, kdamp, ileft, iright, kpos, kdisplace, ain, idisp, id scanu2 1, irate, 6, 2, 3, 4, 5, 2, 9, .01, .01, .1, .9, 0, 0, a0, 0, 2 ;ar scans kamp, kfreq, ifntraj, id k1,k2 scanmap 2, 1000, 1000, 64 display k1, .25 ; note - display is updated every second a1 scans ampdb(p4), cpspch(p5), 7, 2 out a1 endin </CsInstruments> <CsScore> ; Initial displacement condition ;f1 0 128 -7 0 64 1 64 0 ; ramp f1 0 128 10 1 ; sine hammer ;f1 0 128 -7 0 28 0 2 1 2 0 96 0 ; a pluck that is 10 points wide on the surface ; Masses f2 0 128 -7 1 128 1 ; Spring matrices f3 0 16384 -23 "string-128.matrxB" ; Centering force f4 0 128 -7 1 128 1 ; uniform initial centering ;f4 0 128 -7 .001 128 1 ; ramped centering ; Damping f5 0 128 -7 1 128 1 ; uniform damping ;f5 0 128 -7 .1 128 1 ; ramped damping ; Initial velocity - (displacement, vel, and acceleration ; Acceleration is from stiffness matrix pos effect - increases acceleration ; f6 0 128 -7 .01 128 .01 ; uniform initial velocity ; Trajectories f7 0 128 -5 .001 128 128 i"scan" 2 12 86 7.00 i"scan" 14 2 86 5.00 i"scan" 16 2 86 6.00 i"scan" 18 2 86 8.00 i"scan" 20 2 98 10.00 e </CsScore> </CsoundSynthesizer>