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 -odac ;;;realtime audio out, virtual midi in ;-iadc ;;;uncomment -iadc if RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o sfpassign.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; By Menno Knevel - 2020 ; sr = 44100 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 ;load three soundfonts gisf sfload "sf_GMbank.sf2" gir sfload "01hpschd.sf2" giv sfload "07AcousticGuitar.sf2" sfplist gisf sfplist gir sfplist giv ; first, sf_GMbank.sf2 is loaded and assigned to start at 0 and counting up to 328 ; as there are 329 presets in sf_GMbank.sf2. ; then 01hpschd.sf2 is loaded and assigned to replace the 100th preset of sf_GMbank.sf2 ; then 07AcousticGuitar.sf2 is loaded and assigned to replace the 20th preset of sf_GMbank.sf2 sfpassign 0, gisf sfpassign 100, gir sfpassign 20, giv instr 1 inum = p4 ivel = p5 kamp linsegr 1, 1, 1, .1, 0 kamp = kamp/600000 * ivel ;scale amplitude and velocity dependent kfreq = 1 ;do not change freq from sf a1,a2 sfplay3 ivel, inum, kamp, kfreq, p6 ;preset index starts at 0, counting up outs a1, a2 endin </CsInstruments> <CsScore> i1 0 1 60 100 0 ; Piano 1 from sf_GMbank.sf2 i1 + 1 62 < . i1 + 1 65 < . i1 + 1 69 10 . i1 5 1 60 100 100 ; harpsichord from 01hpschd.sf2 i1 + 1 62 < . i1 + 1 65 < . i1 + 1 69 10 . i1 10 1 60 100 20 ; guitar from 07AcousticGuitar.sf2 i1 + 1 62 < . i1 + 1 65 < . i1 + 1 69 10 . i1 15 1 60 100 101 ; Goblin from sf_GMbank.sf2 i1 + 1 62 < . i1 + 1 65 < . i1 + 1 69 10 . e </CsScore> </CsoundSynthesizer>