Mono to Stereo

I am trying to place a sound bite at the beginning of a piece of music. I get an error message because the soundbite is in mono. Is there a way to do this, or is there a way to turn a mono soundbite to stereo?

Audacity is a “multi-track” audio editor. You don’t need to put all of the audio clips into the same track. Just use the “Time Shift Tool” to slide the clips left/right so that they play at the correct time. (https://manual.audacityteam.org/man/time_shift_tool.html)

If the project contains any audio tracks, the project will be mixed down to stereo when you Export.