From: Raymond Yau <superquad.vortex2@gmail.com>
To: "Łukasz Wojniłowicz" <lukasz.wojnilowicz@gmail.com>,
"ALSA Development Mailing List" <alsa-devel@alsa-project.org>,
pulseaudio-discuss@lists.freedesktop.org
Subject: Re: [alsa-devel] Front speakers doesn't work in multichannel output, regression in ALC888
Date: Fri, 8 May 2015 14:49:54 +0800 [thread overview]
Message-ID: <CAN8cciZ52i7ysjdsuEudOtcVCgcYmLJSBmZmUCdqs6BjtDphww@mail.gmail.com> (raw)
In-Reply-To: <1736431.dmQFUpE69t@luklap.workgroup>
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> > > My laptop has built-in front left, front right, rear left, rear right
and
> > > subwoofer and something is strange.
> > > When I set channel output to 5.1 or 4.1 and external speakers are
> > > disconnected, then front left and front right work as expected but
> >
> > built-in
> >
> > > subwoofer is heard only if I test rear left channel (wrong channel
> >
> > mapping?)
> >
> >
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pc
> > i/hda/hda_codec.c?id=cd4035e814b04c009ece9939396d06370c53ed44
> >
> > Seem only two pairs of stereo speakers and internal subwoofer at left
> > channel before this patch
> >
> > ALSA: hda - Enable surround speakers (when line out is also present)
>
> On my laptop case "Virtual SurroundSound" is written . When I test front
left
> and rear left, I hear distinct sound, so it would mean it's from two
different
> sources of sound.
The driver use more than two channels only after David 's patch
But all internal speakers of the notebook are at front of the user, The 3D
sound effect is quite different from your external 5.1 speakers
Do you mean your 5930g need champ {FL FR RL RR LFE }?
This can be easily implemented by using "swap center/lfe" switch for those
codec support R/L swap
http://git.alsa-project.org/?p=alsa-lib.git;a=blob_plain;f=test/chmap.c;hb=HEAD
http://git.alsa-project.org/?p=alsa-lib.git;a=tree;f=src/conf/pcm;hb=HEAD
If codec does not support R/L swap, your 4.1 swap chmap need 5.0 routing
Do you expect pulseaudio show 4.1 swap(5.0) profile for internal speakers
and 4.1 and 5.1 profiles for external speakers ?
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next prev parent reply other threads:[~2015-05-08 6:49 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-02 5:42 Front speakers doesn't work in multichannel output, regression in ALC888 Łukasz Wojniłowicz
2015-05-02 8:05 ` Takashi Iwai
2015-05-02 9:36 ` Raymond Yau
[not found] ` <7993879.9dprRWFvNQ@luklap.workgroup>
2015-05-03 7:53 ` [alsa-devel] " Raymond Yau
[not found] ` <29807127.PULdKhJLmi@luklap.workgroup>
2015-05-06 18:23 ` Raymond Yau
[not found] ` <1736431.dmQFUpE69t@luklap.workgroup>
2015-05-08 6:49 ` Raymond Yau [this message]
[not found] ` <CAN8cciapcbygVjS20+Ln6aDJbd3poieo6-8Zq3x69brsqr+Raw@mail.gmail.com>
[not found] ` <4324603.tPLEjaP5mH@luklap.workgroup>
2015-05-05 16:47 ` Raymond Yau
[not found] ` <4678913.FpDgrA5u1d@luklap.workgroup>
2015-05-11 2:34 ` Raymond Yau
[not found] ` <CAN8cciZS8MhXWy5anxMSgtLdDYHQtURXJ2iEoL0YMpb41EifHg@mail.gmail.com>
[not found] ` <d3bbb31411796d9f835396d30dcaa309@mail.onse.fi>
2015-05-14 6:26 ` Fwd: " Raymond Yau
2015-05-14 7:45 ` Anssi Hannula
2015-05-17 1:49 ` Raymond Yau
2015-05-09 6:00 ` [alsa-devel] " Raymond Yau
2015-06-07 12:44 ` Raymond Yau
[not found] ` <8386507.uauZCcniqC@luklap.workgroup>
[not found] ` <CAN8cciaTZYOQAkaE2aquzcZ_a1QkJAz7u+ff2ceTyrXnKr50RQ@mail.gmail.com>
[not found] ` <5853893.pVbPai8A2z@luklap.workgroup>
2015-06-09 2:23 ` Fwd: " Raymond Yau
[not found] ` <CAN8ccib5rgh2UjNG9isbAkTgMM7MhwL+FMxdd-4Z79Qng5hRNA@mail.gmail.com>
[not found] ` <CAN8cciY=bSpebNXqzYc+Q+MDd9Gr3+KGnpS0GBQpES+-XTY0Dw@mail.gmail.com>
2015-06-09 4:03 ` Fwd: " Raymond Yau
[not found] ` <31911886.6mcodbBrA7@luklap.workgroup>
2015-07-11 1:18 ` Raymond Yau
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