This LAME for Windows installer includes code licensed under the GNU LGPL and GPL ( http://www.gnu.org/licenses/licenses.html ). By using the installed libraries and programs, you acknowledge to have read the terms of these licenses. The LAME MP3 encoder is distributed separately from Audacity because the MP3 technology is covered by patents in certain countries. Therefore in addition to reading the terms of this License Agreement, it is your responsibility to determine the legal position in your own country regarding use of LAME in Audacity. More information is available online at: http://audacityteam.org/wiki/index.php?title=Lame_Installation#Legal_issues . The full text of the LAME Licensing Agreement follows: Can I use LAME in my commercial program? Yes, you can, under the restrictions of the LGPL. The easiest way to do this is to: 1. Link to LAME as separate library (libmp3lame.a on Unix or lame_enc.dll on Windows) 2. Fully acknowledge that you are using LAME, and give a link to our web site, www.mp3dev.org 3. If you make modifications to LAME, you *must* release these these modifications back to the LAME project, under the LGPL. *** IMPORTANT NOTE *** The decoding functions provided in LAME use the mpglib decoding engine which is under the GPL. They may not be used by any program not released under the GPL unless you obtain such permission from the MPG123 project (www.mpg123.de).