1. Voice-controlled data system comprising a storage medium for storing media files, the media files having associated file identification data for allowing the identification of the media files, the file identification data comprising phonetic data including phonetic information corresponding to the file identification data, the phonetic data being supplied to a speech recognition unit that compares the phonetic data to a speech command input into the speech recognition unit, the data system further comprising a file selecting unit that selects one of the media files based on the comparison result.