It's a way to override the simpler settings normally allowed for the dll LAME implementation.

Don't use r3mix without going to www.r3mix.net to read about it. It's an easy read. Just make sure you understand why he chose to configure the preset the way he did.

You can also download LAME.exe and use that with Audiograbber as an EXTERNAL encoder. That way you can easily specify any command line options right in AG. Very easy to do.

Bruno