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A remix is a different work. A different encoding of the same piece is not a different work. If by "different master" you mean a separate recording of a differ
by kbutler 8y ago
A remix is a different work. A different encoding of the same piece is not a different work.
If by "different master" you mean a separate recording of a different performance of the song, then yes, it is a different "work" - a separate copyrightable sound recording, but it is the same work of the song writer.
Re-mastering may or may not create a separately copyrightable work, depending on the creative expression that goes into the re-mastering.
Encoding to cassette, CD, mp3, audio stream in various formats is a mechanical process, not a separate "creative expression" that receives or deserves separate copyright protection.