Hi, Sorry I am new to this forum and could not find a definitive answer by searching. Anyway, I have literally just purchased the HDanywhere 4x2 HDMI Matrix (4x2 HDMI Matrix with IR - Buy online from HD Connectivity) online yesterday so I have not actually got it yet. After buying it I have been thinking whether or not it is going to work for my needs . My aim is to connect a Virgin TiVo box, Xbox 360, and PS3 via HDMI to an LGLM670T TV (which I am going to be buying shortly!) and also have these sources connected to a Dell U2711 monitor. What I want to do is via the opical output on the HDMI matrix, is be able to passthrough 5.1 surround sound (DTS, DD) to my Logitech Z5500 speakers. I know the LG TV has an optical output but I have read that it does not passthrough DTS streams. I realise that the Dell U2711 monitor cannot accept DD or DTS sound (only PCM 5.1) so my question is, does the 4x2 matrix have an audio select button/option? Can 5.1 (DD, DTS), 5.1 (PCM) and 2.0 streams be selected depending on which display I am using, or does it simply depend on the source? Any help will be greatly appreciated. Cheers. Dan.