Timbre.js

system requirements: Chrome 14- or Firefox 4-

// hello, sinewave!!

T("sin", 1320).play();
        

// 880Hz pulse with tremolo(10Hz)
          
T("*", T("pulse", 880, 0.2),
       T("tri", 10, 0.6, 0.8).kr()).play();
        

// 660Hz triangle with vibrato(5Hz)

T("tri", T("sin", 5, 20, 660).kr()).play();
        

// computer noise

var tone, timerId;

tone = T("fami", 440).play();

tone.onplay = function() {
    timerId = setInterval(function() {
        tone.freq = (Math.random() * 2000) + 200;
    }, 100);
};
tone.onpause = function() {
    clearInterval(timerId);
};
        

// chords

var c1, c2, c3, c_env, b0, b_env,
    player, chords = [ /* FM7 | G7onF | Em7 | Am |
                          FM7 | G7onF | E9  | Am | */ ];
chords.index = 0;

player = T("+", T("*", c_env = T("adsr", 20, 1740, 0.5),
                       T("+", c1 = T("konami"),
                              c2 = T("konami"),
                              c3 = T("konami"))),
                T("*", b_env = T("adsr", 0, 220),
                       b0 = T("pulse"))).play();

player.onplay = function() {
    chords.index = 0;
    c_env.bang();
};

c_env.onbang = function() {
    c1.freq = chords[chords.index][0];
    c2.freq = chords[chords.index][1];
    c3.freq = chords[chords.index][2];
    b0.freq = chords[chords.index][3];
    chords.index = ++chords.index % chords.length;
    b_env.bang();
};    
c_env.onS = function() {
    c_env.bang();
};
b_env.onS = function() {
    b_env.bang();
};