title: A Commercial MP3 Encoder/Decoder to use with Sox/Audacity
body: <p>In recent days i've been looking into a way to mix together MP3 files at the point of upload to a website, which is hosted on a linux machine.</p>
  
  <p>So far, thanks to the community, i've learned that using SoX over the command line is probably the most efficient way to actually produce a mixed file from two sources.  I have also discovered that Audacity may also be useable for the purpose.</p>
  
  <p>Unfortunately, both of these programs being free - they do not support the MP3 format due to legal issues around patents and licensing.  I know that support can be added with LAME, however this still remains illegal because LAME is also free and is not licensed by the patent owners.</p>
  
  <p>So I'm looking for a way to add MP3 encoder/decoder support to Sox, Audacity or a similar command-line enabled program, so that it can be used legally within a commercial website.  Searches have once again come up blank, does anyone know of a solution please?</p>