Subcodes:
We can embed the following subcode info into your CD master if you provide this to us and wish us to include it:
ISRC: a unique identification code for each track - currently iTunes and other companies require these in order to digitally distribute your music, and Soundscan uses these also to track sales. Luckily the RIAA can issue these to you for free - just fax in the form you can download from here or go to RIAA's webpage on ISRC's or the IFPI's page for more info.
CD Text: entries for Album Artist, Album Title, Album Songwriter, Track Titles, Track's Artist, Track Songwriter - that will display when the CD is played in CD Text compatible players. While we can enter up to 80 characters for each of these fields we strongly recommend that any entry be kept to 31 characters (including spaces) at maximum as many CD Text compatible players do not display beyond 31 characters.
Please note that CD Text will not display on your computer's media player! In order to display the text information in your computer's media player it must be submitted to Gracenote, AMG Lasso, freedb, or MusicBrainz. Many softwares will allow you do this yourself - information on how to do this with iTunes is available here.
UPC/MCN: the barcode number (11 digit code + 1 digit check sum = 12 digits total) or Media Catalog Number / EAN (13 digit code) - check out the GS1 web site for more information on these. Many CD manufacturers or online distributors such as CD Baby can also provide you with a UPC number for either free or a minimal fee.
Pause ID's: This is an index point we can put after any of the Track ID's in your CD's program that tells the CD player, when displaying program time, to show a backwards countdown to the next Track Id - and is commonly used to mark areas of longer silence between tracks or areas of applause on live albums. Note that areas marked with a pause id are ignored by CD rippers and CD players when put in shuffle mode.