I ve asked this question a few years back but at that moment it was not possible with PDVD, but maybe things changed since then!

Does PDVD12 support Dual Audio Output simultanously? More specific: DTS-MA/True-HD via HDMI out of videocard and at the same time the core DTS/DD signal via a second audio card (eg. Soundblaster X-Fi surround 5.1) through SPDIF optical out?

Why I would need this (I know this question will come so here s the answer already ):
I own a D-Box system which is simply said a moving seating during movies (www.d-box.com). The seating get s it signal from a D-Box decoder (D-Box MCI-2P). This (pc-based) D-Box decoder needs to receive the ORIGINAL core dts/dd signal via optical spdif input in order to work. One can use a simple SPDIF audio card (like the Creative X-Fi surround 5.1 usb). You can connect the spdif output of the audio card to the spdif input of the d-box decoder and from the d-box decoder spdif output you connect the decoder to your avr. Simple as that eh? Of course this way you cannot enjoy dts-ma/true-hd audio.

Over the past years D-Box users have looked for a HTPC solution to be able to use d-box and high-res audio at the same time. Some cable extractors where tried but it never worked (it did not work because the condition of the D-Box decoder is that it needs to receive the core UNALTERED dd/dts signal and with all these extension cables something went wrong that just didn t make it work).

So in all these years d-box users who wanted to have d-box and high res. audio simultanuously needed to use non pc player like the Dune and Oppo player which support audio over HDMI and SPDIF at the same time.

d-box always said they where working a a HDMI decoder but it never came......

But a few month ago there was a breakthrough and a d-box user on the AVS forum managed to get it working on a HTPC! He created his own (altered) version of Media Player Classic Home Cinema and LAV filters http://htpcfordbox.over-blog.com/article-mpc-hc-and-lav-filters-for-htpc-and-d-box-89040282.html). With his software d-box users can now enjoy d-box and high res. audio with a htpc. However, there are some downsides:

- First of all, d-box users are limited and can only use MPC-HC and LAV filters. The biggest downside of MPC-HC is that it does not support 3D so a 3D+d-box+high res. audio is not possible.
- Next there is the author who does not update the software anymore while there has been quite a few new versions of MPC-HC and LAV filters with important fixes. I do not have acces to the source codes.

TMT5 told a few years back they where working on a solution but this project went dead.....

Can PDVD make THE difference here for HTPC+D-Box users?