Can Mastering Fix a Bad Mix? No. … Because mastering deals with a song’s mix at the macro level, it cannot fix issues at the micro level such as within the individual tracks in your song (otherwise than it would be mixing duh!). For example, mastering can’t add delays to just your vocal track.

Now, if you’ve never heard of LANDR before, it’s basically an online, automated mastering service. So, it doesn’t use human beings on the back end; it’s driven by an algorithm. You basically upload your tracks to this service and it automatically masters them, and then it allows you to download them instantly.

There is some debate of whether or not sending music into a professional mastering studio is a necessity. If the mix does not need any modifying : it is at a perfect volume level, fades are well done, EQ is consistent throughout, compression is right on, etc.; then there is no need for mastering.

Mastering is the final step of audio post-production. The purpose of mastering is to balance sonic elements of a stereo mix and optimize playback across all systems and media formats. Traditionally, mastering is done using tools like equalization, compression, limiting and stereo enhancement.