Sorry, I meant surround21. On 16 January 2016 at 17:21, Tom Yan <tom.ty89 at gmail.com> wrote: > What do you mean by "noise in nth output starting from 1 instead, > relatively hight frequency light clicking"? How were you testing > exactly? speaker-test? if so what're the "-D"s you used? Can you paste > full commands (and maybe even the text output). > > What you said doesn't seem to make sense. If surround51 works, then > surround41 and surround20 should at most cause a signal/speaker > mismatch. I don't see how it can produce some weird noise/click. > > On 16 January 2016 at 16:26, Nazar Mokrynskyi <nazar at mokrynskyi.com> wrote: >> OK, I've spent another hour or so trying different combinations and it seems >> to be a bug inside either ALSA or PulseAudio. >> SB Omni Surround 5.1, as you can see from name, has 6 outputs: >> front-left,front-right,rear-left,rear-right,front-center,lfe (lets ignore >> other non-related inputs/outputs here) >> I've done many experiments and defined which modes are working and which >> doesn't. >> >> Modes that work fine: >> - 5.1 >> - 5.0 >> - 4.0 >> - 2.0 >> >> Modes that doesn't work fine: >> - 2.1 (stereo only, noise in 3rd output starting from 1 instead, relatively >> hight frequency light clicking) >> - 4.1 (quadro only, noise in 5th output starting from 1 instead, relatively >> hight frequency light clicking) >> >> It is clearly visible that any time I want to skip some output, for >> instance: >> ttable.0.FL 1 >> ttable.1.FR 1 >> ttable.5.LFE 1 >> instead of >> ttable.0.FL 1 >> ttable.1.FR 1 >> ttable.2.LFE 1 >> >> To direct LFE to proper output it doesn't work. This is the same reason why >> 5.0 is working fine (no skipped outputs, all consequent) and 4.1 doesn't (we >> need to skip 5th output starting from 1 and use 6th instead). >> >> When I try this: >> ttable.0.FL 1 >> ttable.2.FR 1 >> ttable.1.LFE 1 >> then as expected I can hear LFE in right front output. >> >> Any hints from anyone what is wrong here? There are literally NO DOCS about >> how it works internally, so these experiments all I can provide at the >> moment. >> There were pulseaudio logs in this thread if anyone needs details. >> >> ALSA 1.1.0, PulseAudio 7.1, Ubuntu 16.04 x64 >> >> Sincerely, Nazar Mokrynskyi >> github.com/nazar-pc >> Skype: nazar-pc >> Diaspora: nazarpc at diaspora.mokrynskyi.com >> Tox: >> A9D95C9AA5F7A3ED75D83D0292E22ACE84BA40E912185939414475AF28FD2B2A5C8EF5261249 >> >> On 28.11.15 09:56, Raymond Yau wrote: >> >> >>> >>> I've been looking at those lines. Do you think it should be done in >>> USB-Audio, or should it be added into separate config file specific for this >>> sound card? >> >> http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=src/conf/pcm/surround21.conf;hb=HEAD >> >> The route of surround21 is hardcoded to use surround51 , this mean your >> ttable are used by those usb audio support 6 channels, those usb audio which >> only support 8 channels need to define their own 21 route as both surround51 >> and surround71 of usb audio use route plugin >> >> >> >> _______________________________________________ >> pulseaudio-discuss mailing list >> pulseaudio-discuss at lists.freedesktop.org >> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss >> >> >> >> _______________________________________________ >> pulseaudio-discuss mailing list >> pulseaudio-discuss at lists.freedesktop.org >> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss >>
