[LAU] isrc - possible with linux

Hi I'm about to release a CD (made with linux) which is very do-it-yourself'ish. When I'm delivering my audio to the CD-pressing company, I was told that I should "put my isrc code into the audio". Well I didn't receive this code yet, but I was told that this is normally done by the company that does the master, but in this case that's me... Since it'll cost me something that translates to about $150 to have the CD-pressing company "put it into the audio", I'd obviously like to do it myself. However I have no clue what-so-ever what this code is or does. Anyone knows if it's possible to do this with some linux tool? -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://modlys.dk