Methods and apparatus allow a liquid to be substantially contained between a lens and a wafer table assembly of an immersion lithography system. The femoral stem component comprising a neck portion, a flange portion, a transitional body region and an elongated stem. A recorder according to the invention has a check unit for checking, in advance, the possibility of after-recording operation of the recorder to the audio stream to be after-recorded with reference to the bit rate information of the audio attribute information. Enabling the system to process data according to the set of parameters. The present application addresses the problem that videos collected by fans at concerts and other events generally have poor sound quality and provides a solution that matches a high quality sound to the video.