private void updateXY(int velocity)
{
this.x = (double)velocity * Math.Sin(speakerTheta * Math.PI / 180.0) * Math.Cos(speakerAltitude * Math.PI / 180.0);
this.y = (double)velocity * Math.Cos(speakerTheta * Math.PI / 180.0) * Math.Cos(speakerAltitude * Math.PI / 180.0);
this.z = (double)velocity * Math.Sin(speakerAltitude * Math.PI / 180.0);
}