BurnCD

From Audacity Manual

To burn your work to an audio CD for standalone CD players, first export it as WAV or AIFF. The exported file should be stereo, 44100 Hz (set in the "Project Rate" tool at the bottom left of the project window) and 16 bit (set via the "Options" button in the file export dialog). These are Audacity's default settings, so normally you will not need to change these before exporting.

Burn the exported file to an "audio CD" - not a "data CD" or "MP3 CD" - with a CD burning program like iTunes or Windows Media Player. For more help, see How to burn CDs online.

To Getting Started.