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> -W -o lfsr.wav </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 44100 ; ksmps = 1 ; nchnls = 2 0dbfs = 1.0 ; triangle wave gitabsz init 2^13 giTri ftgen 1, 0, gitabsz, 7, 0, gitabsz/4, 1, gitabsz/2, -1, gitabsz/4, 0 ; Grady Centaur scale giCent = ftgen(100, 0, 128, -51, 12, 2, 297.989, 60, 1.0, 21/20, 9/8, 7/6, 5/4, 4/3, 7/5, 3/2, 14/9, 5/3, 7/4, 15/8, 2.0) ; just print the values instr 1 kn = lfsr(5, 128) printk2(kn) endin ; play a melodic sequence instr 2 idur = p3 iamp = p4 iwav = p5 itun = p6 ; keep range small and transpose up 2 octaves to ensure audibility ; we're interpreting these number like MIDI notes numbers for easy table lookups kidx = lfsr(5, 128) + 24 ktrig = metro(1) schedkwhen(ktrig, 0, 1, 3, 0, 1, iamp, iwav, itun, kidx) endin instr 3 idur = p3 iamp = ampdb(p4) iwav = p5 itun = p6 inote = p7 kenv = linen(iamp, 0.1, idur, 0.1) aout = poscil3(kenv, tablekt(inote, itun), iwav) outs(aout, aout) endin </CsInstruments> <CsScore> i 1 0 0.25 i 2 0 10 -6 1 100 e </CsScore> </CsoundSynthesizer>