I have a question about this process, with this program. it says, in the cmd window that it extracts HD core from thd.

so what i want to know is the conversion then just happening between the embedded ac3-640 stream of the thd file and the remaing dts, or does some of that HD info get converted into dts as well??

ie: is this a pointless conversion compared to downconverting to ac3-640 while demuxing and leaving it at that; because i believe if i'm just converting ac3-640 to dts, all i'm getting is a file twice the size, but with same sound, due to source. is that correct??