Interface RVA

interface RVA {
    bass?: number;
    center?: number;
    deprecated?: boolean;
    left: number;
    leftBack?: number;
    peakBass?: number;
    peakCenter?: number;
    peakLeft?: number;
    peakLeftBack?: number;
    peakRight?: number;
    peakRightBack?: number;
    right: number;
    rightBack?: number;
}