Audacity Forum

Steve - thanks. I realize this may be a dumb follow up question but does this encoder change the actual format from MP3 to something else? And if so what format is ideal and is the smallest size to send via email?

Maybe someone can help me with taking numerous sound (not music - just speaking/45 minute to 2 hour) recordings (mp3 format) and compress them in order to send them via email.
Is it possible? Does Audacity do this? And is it difficult?