Audio and MP3 :

MP3 Surgeon 2.1
A Visual MP3 editor which allows users to trim, join and split any number of MP3s to varying lengths and sizes, apply fade in/out effects, normalise their entire collection to the same volume level - and much much more besides.
This software is a commercial software. You will be able to download and test MP3 Surgeon during a certain period of time, then, if it does what you need, you will have to acquire the full version. The trial version available for download on www.softandco.com has a size of 1001 KBytes. For additional information and support request, please contact directly MP3 Surgeon publisher.
MP3 Surgeon 2.1 was released by MP3 Surgeon on Tuesday 18 June 2002. Its known requirements are : Pentium 100, 16Mb RAM, Sound Card.
MP3 Surgeon will run on Windows 95, Windows 98, Windows Me, Windows 2000, Windows NT and Windows XP.