// Short synthesized blips, so there are no audio files to ship. Silent until the
// first move, since browsers only allow audio after a user gesture.
let ctx = null;
function tone(freq, ms, gain) {
    if (!ctx)
        ctx = new (window.AudioContext || window.webkitAudioContext)();
    const osc = ctx.createOscillator();
    const vol = ctx.createGain();
    osc.type = "triangle";
    osc.frequency.value = freq;
    vol.gain.value = gain;
    osc.connect(vol).connect(ctx.destination);
    const t = ctx.currentTime;
    vol.gain.setValueAtTime(gain, t);
    vol.gain.exponentialRampToValueAtTime(0.0001, t + ms / 1000);
    osc.start(t);
    osc.stop(t + ms / 1000);
}
export const sound = {
    move: () => tone(220, 70, 0.05),
    capture: () => tone(150, 110, 0.07),
    check: () => tone(440, 130, 0.06),
    end: () => {
        tone(330, 160, 0.06);
        setTimeout(() => tone(247, 220, 0.06), 120);
    },
};