Regarding Dolby/DTS downmix setting, I'd like to point out that in my opinion Vuplus should eventually find a way to implement and provide an Auto downmix functionality as do all the DVD/Bluray players and HD tuners that I know and have used.
In those devices the automatic audio stream selection is based on the HDMI connection protocol itself, that allows the "sender" device and the "receiver" device to negotiate the best audio digital stream supported by both of them.
In the case of a TV set, via HDMI it's generally only capable to accept a stereo PCM digital stream, while all the home theater systems are obviously capable of Dolby/DTS/PCM multichannel digital audio stream decoding.
About me, I alternate between the use of a TV set and a home theater system (by means of a HDMI switch), and until now (before Duo2) I never had to manually change the audio settings of my DVD/bluray players or HDTV receivers.
Just to make some example of HD sat tuners, using italian SkyBoxHD, MySkyHD or XDome (italian official alternative Sky-NDS receiver) I never had to change any audio setting (nor probably they even have any), but I was always able to automatically get the best audio stream both when switched to TV and to my home theater amplifier.
Well, I think that Vuplus should try to implement this HDMI automatic best audio negotiation because this functionality is already available even in the cheapest HDTV tuners and DVD/Bluray players, and it should not be difficult to implement, possibly by means of a dedicated plugin.
Thanks for reading!