Well, forget about StarBurn SDK. I've found an open source alternative for Delphi! Here are some links:
http://www.moby-tones.co.uk/cdburn.htm
http://www.dancemammal.com/cdburn.htm
It seems that the library is not complete yet, but here is a quote from the website:
It may be very interesting if someone wants to code a CD/DVD burning plugin for TC (I'm not asking for someone to do it, although it seemsFreeBurner Mini Site wrote:FreeBurner is a Open Source CD / DVD Burning Suite for Delphi, It is the purpose of this site to entice developers to join the project and add their expertise to the library, in the hope of producing a stable and usable set of library tools for CD and DVD burning. Most of the library has been coded, but there are many places where developers can find better ways of coding the routines.

I've found this project in this interesting page, where you can find a list of opensource, freeware and shareware recording libraries.
Hope it's useful...