Hello.
I don’t know, where to add this little tutorial, but I’ll try to do It here.
If You’d like to analise tempo of one song, just select region of the song to be a loop. Make sure, that correct loop is selected. Then save It. After that, view Audacity to musical mode (mainly set time line to beats and bars), open saved loop and confirm yes. After that, tempo will be automatically analised.
I don’t know, how to send You a tutorial, because Audacitywiki is away.
Thank You.
Marco Oros