Hi all, I've seen many helpful threads here, but never posted anything until now, hopefully I have some luck, too I have: -WDTVLive device: http://www.wdc.com/en/products/products.aspx?id=330 -Optical cable -Samsung Blu-Ray player with integrated 5.1 surround, "Model Code : HT-D5100Series_ZC": http://www.samsung.com/us/support/supportOwnersProduct.do?prd_mdl_name=HT-D5100 User manual here: http://downloadcenter.samsung.com/content/UM/201202/20120202151939228/HT-D5100_XAA_web_1224.pdf The D5100's Digital In supports only DTS and Dolby Digital audio, so I only chose those in the WDTVLive's output options. When playing a DD5.1 file through the WDTVLive, through the optical cable, to the D5100's Digital In, it plays beautifully, I love it. When playing an AAC2.0 file the same way, it plays through 2.0 speakers only. I would like all audio to play through all the speakers, even if it's only coded in Stereo (or even Mono). How can I do this? I couldn't find a function like that in the D5100's menus. Edit: I got it to upmix using (in the D5100) Dolby Pro Logic II, but it only works in "Matrix" mode (not Music, Movie, or Prologic). Shouldn't it work in any mode? I thought that was the purpose of ProLogic?