'Twas brillig, and Tanu Kaskinen at 08/11/10 17:47 did gyre and gimble: > On Thu, 2010-11-04 at 22:47 +0000, Dom H wrote: >> I have a 4.1 system and pulse does a good job of mixing the missing >> centre into the fronts for 5.1 audio tracks, I'm recently switched >> from a digital out system with my external receiver doing all the >> decoding and mixing, to my HTPC doing the job and outputting analogue >> to my amp. I'm trying to get pulse to mimic the exact behaviour of my >> external decoder, have a few questions though; >> >> 1. Can I stop 2ch audio being mixed to all 4 speakers but retain the >> centre mixing into the mains for 5.1 tracks? > > I don't think so. I think one way to get half-way towards this solution would be to use a module-remap-sink with a 2 channel setup and the remix=no argument. When you want to play 2ch sounds, you will have to explicitly select the 2ch virtual device which may not be that convenient. >> Have the pulse devs considered replicating how most hardware decoders >> handling speaker configuration? As an example, on my Denon receiver, >> each speaker can be configured as Large, Small or None. Large speakers >> receive regular full range output, small speakers have their low >> frequency mixed to the subwoofer output and output sent to a 'None' >> speaker is mixed elsewhere (eg centre into fronts) Seems like quite an >> elegant solution, would certainly solve all the issues I'm seeing >> listed above. > > I haven't heard that anyone is planning to improve the remixing code. > Patches would surely be accepted, though, so it's only a question of who > has the time and motivation to do the work. > > For the issue number one, adding a configuration option for stereo > duplication shouldn't be very hard. Any takers? I think in the past we discussed how to configure mixing in this way but I can't remember what we came up with. I think the general options were relating to how mono and stereo sounds were upmixed but further than that too much configuration was kinda thought to be unnecessary (generally speaking - someone will always find a need of course!) Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited [http://www.tribalogic.net/] Open Source: Mageia Contributor [http://www.mageia.org/] PulseAudio Hacker [http://www.pulseaudio.org/] Trac Hacker [http://trac.edgewall.org/]
