Audio software for Windows

Foobar2000

Foobar2000 is an advanced audio player for the Windows platform. Some of the basic features include full unicode support, ReplayGain support and native support for several popular audio formats
Features

• Audio formats supported: MP1, MP2, MP3, MP4, MPC, AAC, Ogg Vorbis, FLAC / Ogg FLAC, WavPack, WAV, AIFF, AU, SND, CDDA.
• Full unicode support.
• Advanced tagging capabilities.
• Support for transcoding all supported audio formats using the Converter component (requires external commandline encoder executables for different output formats).
• ReplayGain support - both playback and calculation.
• Customizable keyboard shortcuts.
• Open component architecture allowing third-party developers to extend functionality of the player.

For more information and to download go here.

Audiograbber

Audiograbber is software that grabs digital audio from cd's. It copies the audio digitally-not through the soundcard-which enables you to make perfect copies of the originals. It can even perform a test to see that the copies really are perfect. Audiograbber can also automatically normalize the music, delete silence from the start and/or end of tracks, and send them to a variety or external MP3 encoders, such as Fraunhofers L3enc, or even use some MP3/WMA encoders internally for automatic creation of MP3's. Audiograbber can download and upload disc info from freedb, an Internet compact disc database. You can even record your vinyl LP's or cassette tapes with Audiograbber and make wav's or MP3's of them. There are a lot more functions in Audiograbber, but to put it simply: Audiograbber has the most features one can wish from such a program!
For more information and to download go here.
UPDATE: For using lame 3.99 please go here http://usefulcomputerhelp.blogspot.com/2011/10/lame-399.html


Audacity

Free, Cross-Platform Sound Editor.
Audacity® is free, open source software for recording and editing sounds.
For more information and to download go here.