Remaster

Remaster (also digital remastering and digitally remastered) refers to enhancing the quality of the sound or of the image, or both, of previously created recordings, either audiophonic, cinematic, or videographic.

Mastering

To understand the concept of remastering, it is beneficial to understand that often a pyramid of copies would be made from a single original "master" recording, which might itself be based on previous recordings. For example, sound effects (a door opening, punching sounds, falling down the stairs, a bell ringing, etc.) might have been added from copies of sound effect tapes similar to modern sampling to make a radio play for broadcast.

A master is the recording which experts state will be the definitive copy that is duplicated for the end user usually into other formats i.e. LP records, CDs, DVDs etc.

Problematically, several different levels of masters often exist for any one audio release. As an example, examine the way a typical music album from the 1960s was created. Musicians and vocalists were recorded on multi-track tape. This tape was mixed to create a stereo or mono master. A further master tape would likely be created from this original master recording consisting of equalization and other adjustments and improvements to the audio to make it sound better on record players for example.