09.03.2015 15:11, Thomas Martitz wrote: > Am 08.03.2015 um 12:42 schrieb Alexander E. Patrakov: >> But, why are you using the passthrough mode at all? HDMI, unlike >> SPDIF, has enough bandwidth to pass the 7.1 PCM stream. For SPDIF, >> passthrough was a necessity due to this bandwidth limitation. For real >> HDMI (as opposed to HDMI-to-SPDIF converter that doesn't support >> multichannel PCM anyway), it only serves marketing purposes (i.e., in >> theory, provides no benefits over software decoding and sending the >> resulting multichannel PCM stream). I sometimes think that the proper >> fix is to disallow passthrough completely for multichannel HDMI >> profiles, i.e. to effectively hide the checkboxes that you have >> demonstrated on the screenshot. >> > > > 1) You might want to decode Dolby Digital / DTS on an external receiver > because decoding on the PC requires a license. Does not apply here - Xamindar is already willing to install Kodi and VLC, products that include the decoder. But yes, theoretically, due to bad laws in some countries, it is valid there. > 2) Receivers might only accept spdif-data (plain stereo or encoded) > regardless of HDMI's theoretical capabilities. Also does not apply here (but yes, it does apply if a TV is connected via HDMI, and the receiver is connected to that TV via SPDIF, and the TV does not have a built-in AC3 or DTS encoder). By selecting a multichannel profile, Xamindar has already indicated that his receiver is not of this variety. > > If PA is actually unable to pass through in multichannel profiles, then > yes, pavucontrol should not show the check boxes, or better yet grey > them out with a "Change to stereo profile" tooltip. I have already submitted a patch that hides these checkboxes. But it seems like Arun is going to work on a better solution, so let's wait and see the result :) -- Alexander E. Patrakov
