To all musicians; procedures like mastering, mixing and publishing sound very interesting. Have you all ever realized about there are some terms that are related to music and without them, it is not possible to publish even one single song? Each of the mastering engineer having good knowledge about the terms like Metadata embedding, UPC/EAN codes, QC and ISRC codes. They are very important when you are dealing with sound engineering. Without these codes, no musician can ever bring the music to live.