Selecting passthru audio in MPC HC rather than the prologic

[skinney6]

I used handbrake to make an mvk of a movie
i did a ac3 dolby 5.1 passthru track
and a dolby 5.1 aac prologic track
when i play in mpc hc the prologic is playing on my receiver.
but if i just do 5.1 passthru it's plays dolby digital on my receiver
how do i tell mpc to send the compressed 5.1 straight to the avr when both tracks are present?

thanks

[skinney6]

i actually played some of the movies that i had only one audio passthru track on my system with no avr and there was sound thru the tv speakers so i guess i can get away with having only the passthru track.

[mammo1789]

try ac3filter