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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 ; Audio out Audio in -odac -iadc ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o r.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; Initialize the global variables. ; sr = 44100 ; kr = 4410 ; ksmps = 10 ; nchnls = 1 ; Instrument #1. instr 1 ; The score's p4 parameter has the number of repeats. kreps = p4 ; The score's p5 parameter has our note's frequency. kcps = p5 ; Print the number of repeats. printks "Repeated %i time(s).\\n", 1, kreps ; Generate a nice beep. a1 oscil 20000, kcps, 1 out a1 endin </CsInstruments> <CsScore> ; Table #1, a sine wave. f 1 0 16384 10 1 ; We'll repeat this section 6 times. Each time it ; is repeated, its macro REPS_MACRO is incremented. r6 REPS_MACRO ; Play Instrument #1. ; p4 = the r statement's macro, REPS_MACRO. ; p5 = the frequency in cycles per second. i 1 00.10 00.10 $REPS_MACRO 1760 i 1 00.30 00.10 $REPS_MACRO 880 i 1 00.50 00.10 $REPS_MACRO 440 i 1 00.70 00.10 $REPS_MACRO 220 ; Marks the end of the section. s e </CsScore> </CsoundSynthesizer>