home entertainment: music

everything needs to be categorizable into moods, i dont believe in the concept of rock pop hip hop and bee bop, i mean thats also one classification, its a taxonomy created by the music industry, what people need is moods, is it a melancholic song for a sunday afternoon, or a lazy saturday song for a quite book, is it an angry song or an inspirational song, slow dance under the moonlight or a song to make love to at noon, and a song can be many of these things, so it should be categorized in all those moods.
hence i have a database to hold all my songs and the meta data for those songs, meta data i mean not only who sang it when and where but also what moods it belongs to, when can i play it where and for whom.
also the entertainment system should maintain how many times the song was played, the lyrics of the song, other people who like it etc
need to be able to genrate play lists, 1/2/...n song lists, play random songs play language songs
one interesting scenario is when i go from one room to another it should pick up the song when i left that room and continue playing the song in the other room, the easiest thing is to switch the speaker the song is playing on