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 getseed.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 44100 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 ; by Menno Knevel - 2021 seed 0 ; use seed from system clock instr 1 ; different values every time - value is derived from system clock krnd randomh 100, 400, 1 printks2 "different values every time Value = %d\n ", krnd aout poscil 0.8, 440+krnd outs aout, aout endin instr 2 ; same values every time - captured by getseed gised getseed ; capture the clock seed value and make it a global value seed gised ; so that it can be used in all instruments print gised krnd randomh 100, 400, 1 printks2 "get seed value from time clock. Value = %d\n ", krnd aout poscil 0.8, 440+krnd outs aout, aout endin instr 3 ; same values every time - captured by getseed print gised ; check the global seed value seed gised ; let the seed get this value krnd randomh 100, 400, 1 printks2 "re-uses seed value of instr 2. Value = %d\n ", krnd aout poscil 0.8, 440+krnd outs aout, aout endin </CsInstruments> <CsScore> i1 0 3 ; 2 notes showing the different i1 5 3 i2 10 3 ; 1 note & get the seed value i3 15 3 ; 1 note and use that seed value again e </CsScore> </CsoundSynthesizer>