View Single Post
Old Aug 27, 2009, 02:12 PM
Anders Anders is offline
Join Date: Nov 2008
Posts: 36

Originally Posted by Kaleb.G View Post
So what should be done? If it's not technically a catalog number we shouldn't use it as one. However, if it serves as a unique identifier, perhaps that is information that could be useful.
You're right about that, "matrix code" info is as unique an identifier as you get, but as said it's an internal pressing plant ID. The CD should just be listed as N/A or however you list discs without catalog numbers on this site.

If not, you'll get discs from different record labels listed as DIDX, which is hardly useful, but in fact misleading - they seem to come from the same company, while they just happened to be pressed at the same plant. I know there are a few CDs on the site listed with DIDX as the catalog number.

Whether you want to include the information somewhere else on an item-page is something to consider, but if you do, why stop with only DIDX codes? Why not list all matrix codes for discs pressed at any plant? Matrix (and IFPI) codes can tell a lot to the trained eye; country of manufacture, approximate time of manufacture, counterfeit identification... (But with this site I think it's not really necessary information.)

I suggest to just drop it, and leave all these discs as N/A.

A few notes to consider:

1. I guess DIDX codes were singled out for discs without catalog numbers because the structure resembles catalog numbers; letter prefix-numbers. But if you follow this way, you end up with catalog numbers like C2 176785-01 and Z35867#3SRC etc.

2. Some discs, even though there are no catalog number written on the inserts or disc artwork, DO in fact have the actual catalog number written in the matrix code (catalog numbers are very often included in matrix codes together with internal pressing plant ID).

For example several recent Capcom promo DVDs come without a printed cat#, but in the matrix code the code CAP-071115 can be found on a particular disc. You still need to be able to know how to pick the catalog number from the rest of the code which is not a catalog number, though - and keep in mind that many discs does not have a catalog number in the matrix code at all. In this case it was simple, as there are several Capcom DVDs with similar catalog numbers.

One way could be to list the catalog number of the game it came with. After all, the OST is a part of a product, not a product in itself. That's why the CD doesn't have a cat#, it doesn't need one. (In this case it's a bit troublesome as it came with both the PS2 and the PC versions of the game, "SLUS 20622" and "23443" respectively.) But as this site focuses solely on the OST, I'm not sure if it's a good idea.

I suggest just to drop it, and leave all these discs as N/A.

(For the super-interested reader, I've written a general guide to CD manufacturing and the meaning of these codes/ when they are added to the master/CD: )

Last edited by Anders; Aug 27, 2009 at 02:26 PM.
Reply With Quote