Here’s a little information for people who still treasure your CD collection. You may have noticed a sort of code on older releases—odd abbreviations like AAD or ADD and a few others. What do they mean?
They told us the process of how the CD was made.
The first “A” in “AAD” means that the music was made using analog equipment. The second “A” means that the mastering was done on analog gear.
And the final “D” meant that you were holding a digital product. This was a big deal back in the day because people seemed interested in how old and new technology was used in making that recording.
Today, we don’t see many CDs with those abbreviations, simply because almost every recording from start to finish is done digitally.