Why is CD Mastering necessary?
In the recording studio, you record one song at a time, and the focus of the recording or mixing engineer is to make each song great. The result, however, is generally a collection of songs that all peak at different levels and may have different EQs. In the post-production phase (called Audio Mastering or CD Mastering), a professional engineer unifies the CD by using EQ, compression, and other dynamics processing to give it a consistent sound from track to track.
