// https://webaudio.github.io/web-audio-api/#GainOptions
dictionary GainOptions : AudioNodeOptions {
    float gain = 1.0;
};

// https://webaudio.github.io/web-audio-api/#GainNode
[Exposed=Window]
interface GainNode : AudioNode {
    constructor(BaseAudioContext context, optional GainOptions options = {});
    readonly attribute AudioParam gain;
};
