Audacity is a free audio editing tool that you can download online. That will let you cut audio from a source like you want to do.
It doesn't do DTS-HD but you can rip the decoded audio as a .wav file which is uncompressed PCM. Pretty much the same thing.
It doesn't do DTS-HD but you can rip the decoded audio as a .wav file which is uncompressed PCM. Pretty much the same thing.