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 -+rtmidi=virtual -M0 ;;;realtime audio out and midi in ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o midicontrolchange.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 instr 1 ; use slider of contr. 7 of virtual keyboard kcont init 1 ; max. volume midicontrolchange 7, kcont, 0, 1; use controller 7, scaled between 0 and 1 printk2 kcont ; Display the key value when it changes and key is pressed kenv madsr 0.5, 0.8, 0.8, 0.5 ; envelope multiplied by asig pluck kenv*kcont, 220, 220, 2, 1 ; value of controller 7 outs asig, asig endin </CsInstruments> <CsScore> f 0 30 f 2 0 4096 10 1 i 1 10 2 ; play a note from score as well e </CsScore> </CsoundSynthesizer>