[Yappa]

Hmmm, well LAV is WYSIWYG more aimed at passthrough etc, rather than a processor; I could be wrong, but for prologic, surely LAV just needs to pass the audio through to your amp, and then your AVR should do the work? Normally there is a Dolby Prologic mode you can switch to that is intended to pick the signal up from a stereo signal and then deal with it, I know that's the way my Yamaha AVR, and my friend's Onkyo work, it's a setting/audio processing option you can set the amp to, rather than it being automatic. I have it enabled for the input on mine I run my Wii through.

My problem is that the DSPlayer audio is recognized as Multichannel, meaning that all speakers are considered active although only the front speakers are actually used. That's why I can't activate PLII on the AVR itself.
In that situation the PL modes are gone and the only option via the AVR to use all speakers is to switch to "All Stereo".
Thankfully, with ffdshow I can apply PLII to all stereo sources before sending the Multichannel audio to the AVR.

Of course it's very likely that it's just me messing up the speaker config and that DSPlayer is not at fault.

In regards to Ordered Chapters; I believe this is something Nevcariel hasn't included in LAV's splitter, nor is it included in the standard DSPlayer splitter, however DSPlayer can be configured to use Haali's splitter which I believe does support Ordered Chapters, so might be worth a shot? This is part of the benefit of DSPlayer, it's rather customisable

I figured it out.
I already knew that I had to use Haali, but I failed to notice that it belongs to the type "source" instead of the type "splitter".
I now have it as both. For the record, this is how the relevant mkv parts of my mediasconfig.xml look like now:

Code:

<source filter="haali" />
      <splitter filter="haali" />
      <video filter="lavvideo" />  
      
      <audio filter="ffdaudiodec" />

Hi10 support check, ordered chapters support check, subtitles support is still not perfect though. See UTW logo at the Fate/Zero title screen or the multilayered karaoke effects. Or is that part also customizable?

Hope that helps

Glad by and large the guide worked for you though!

I added it to the first post.