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 ;-iadc ;;;uncomment -iadc if RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o sfpreset.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 gisf1 sfload "sf_GMbank.sf2" sfplist gisf1 ;list presets of first soundfont gisf2 sfload "07AcousticGuitar.sf2" sfplist gisf2 ;list presets of second soundfont gir sfpreset 51, 0, gisf1, 0 ;assign Synth Strings2 (#51)to index 0 giv sfpreset 0, 0, gisf2, 1 ;assign AcousticGuitar (#0) to index 1 print gir print giv instr 1 inum = p4 ivel = p5 kamp linsegr 1, 1, 1, .1, 0 kamp = kamp/600000 ;scale amplitude, small value due to 0dbfs = 1 kfreq = 1 ;do not change freq a1,a2 sfplay3 ivel, inum, kamp*ivel, kfreq, p6 outs a1, a2 endin </CsInstruments> <CsScore> i1 0 1 60 127 0 ;= Synth Strings I from first soundfont i1 + 1 62 < . i1 + 1 65 < . i1 + 1 69 10 . i1 5 1 60 127 1 ;= AcousticGuitar from second soundfont i1 + 1 62 < . i1 + 1 65 < . i1 + 1 69 10 . e </CsScore> </CsoundSynthesizer>