Mixing involves adjusting and combining individual tracks into a stereo or multichannel format, a.k.a. the mix. Mastering involves processing your mix into its final form so that it's ready for distribution, which may include transitioning and sequencing the songs.

Should you master while mixing?

The great myth about mastering is that it is a magical process that will make your mixes better. The truth is, mastering is a simple process that can't do much for crappy mixes. If your mixes are good, then you won't need mastering to improve them.

What comes first mixing or mastering?

Basically, mixing is the step before mastering that involves adjusting and combining individual tracks together to form a stereo audio file after mixdown. The stereo file is then mastered, which ensures that the various songs are clearly polished and form a cohesive whole on an album.