Installation of the converter

Hi ! I’m french so I’m sorry for my bad english. I don’t know how do you install the converter LAME, can you explain me please ???

Salut, je ne sais pas comment on installe le convertisseur LAME, pouvez-vous m’expliquer svp ???

Thank you !
Merci !

Please see

If you need help after that, please state your version of Audacity and version of Windows, Mac or Linux.