[Freeswitch-users] Use of the Call Recording LAME library (.wav -> .mp3) - free or licensed?

For those who use FreeSwitch for commercial purposes in the US - did you have to buy any license to use LAME? Need to translate from .wav to .mo3 to play the recording. Do I need to worry? WinLAME README: “Note that personal and/or commercial use of compiled versions of the LAME encoding engine (including the DLL distributed with winLAME) requires a patent license in some countries. Check before using winLAME!” Thanks, A.C.