interface AudioParam {

                    attribute float value;
    readonly        attribute float defaultValue;
    readonly        attribute float minValue;
    readonly        attribute float maxValue;

    // Parameter automation.
    void setValueAtTime(float value, double startTime);
    void linearRampToValueAtTime(float value, double endTime);
    void exponentialRampToValueAtTime(float value, double endTime);

    // Exponentially approach the target value with a rate having the given time constant.
    void setTargetAtTime(float target, double startTime, double timeConstant);

    // Sets an array of arbitrary parameter values starting at time for the given duration.
    // The number of values will be scaled to fit into the desired duration.
    void setValueCurveAtTime(Float32Array values, double startTime, double duration);

    // Cancels all scheduled parameter changes with times greater than or equal to startTime.
    void cancelScheduledValues(double startTime);

};