#import #import #import // 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; };