We organize all of our music and sound files using iTunes. It is a free sound library software available from Apple and is very easy to use. When linked to an iPod it becomes a portable and flexible music library. Now Apple has released a little box called Airtunes. This is basically a wireless base station that can connect to a sound system. From our main computer (with a wireless card), iTunes sends the music, or audio book, or radio show we wish to play across the house to the Airtunes which is plugged into the speaker system. Now the computer is linked to the house and we can all hear the music very well. The Airtunes thing is about $120 US.