ACE dvd player MOD to have line-in for surround sound output

[a.out (drako65)]

Mga SIS,
Pwede kayang i-mod yong dvd player na may surround output para gawing parang surround preamplifier?
Nagawa ko yong hafler matrix gamit opamps. ok naman. gusto ko namang i-try yong dsp chips.
Ang dvd player may mic in at saka usb in.
Maraming salamat in advance.