From: Raymond Yau <superquad.vortex2@gmail.com>
To: ALSA Development Mailing List <alsa-devel@alsa-project.org>
Subject: Re: Mixer volume/decibel mapping
Date: Wed, 26 May 2010 07:24:51 +0800 [thread overview]
Message-ID: <AANLkTim4sq_jBHYvxnLk2Pw5bdUDEMJahHPBJGIXH8ds@mail.gmail.com> (raw)
In-Reply-To: <AANLkTimNj_7k_l7nKLk87towdjtN5j0CSdmws02gpg8v@mail.gmail.com>
2010/5/25 James Courtier-Dutton <james.dutton@gmail.com>
>
>
> Could this maybe explain why pulseaudio was having such problems with
> alsa with regards to gain controls????
>
I don't think so since no soc user report wrong dB range
http://www.pulseaudio.org/wiki/WritingVolumeControlUIs
If the flat volume model of PA is 0% to 150% , this mean that alsa-lib does
not provide any DB scale suitable for PA to implement dB info for the pulse
device as DB_LINEAR require max is 0dB ( at least capture stream must have
gain )
only one of the PA developer complain about his HDA codec has incorrect dB
range but not willing to provide alsa-info.sh
There is a patch which may affect the dB scale
http://git.alsa-project.org/?p=alsa-kernel.git;a=commitdiff;h=7c7767ebe2fa847c91a0dd5551ca422aba359473;hp=29fdbec2dcb1ce364812778271056aa9516ff3ed
next prev parent reply other threads:[~2010-05-25 23:24 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-19 16:34 Mixer volume/decibel mapping Sebastian H.
2010-05-20 7:34 ` Clemens Ladisch
2010-05-20 8:01 ` James Courtier-Dutton
2010-05-20 8:53 ` Raymond Yau
2010-05-20 9:41 ` Sebastian H.
2010-05-20 16:13 ` James Courtier-Dutton
2010-05-21 0:35 ` Raymond Yau
2010-05-21 1:30 ` Raymond Yau
2010-05-21 8:18 ` Sebastian H.
2010-06-07 3:37 ` Raymond Yau
2010-06-07 9:19 ` Sebastian H.
2010-06-08 1:03 ` Raymond Yau
2010-06-08 6:02 ` Sebastian Holtermann
2010-06-08 15:31 ` Raymond Yau
2010-06-09 10:26 ` Sebastian H.
2010-06-08 6:08 ` Sebastian H.
2010-06-09 5:39 ` Raymond Yau
2010-06-09 7:34 ` Sebastian H.
2010-06-10 0:08 ` Raymond Yau
2010-06-09 5:55 ` Raymond Yau
2010-06-08 2:23 ` Raymond Yau
2010-05-21 6:35 ` Clemens Ladisch
2010-05-21 6:51 ` Peter Ujfalusi
2010-05-21 9:56 ` Clemens Ladisch
2010-05-24 2:52 ` Raymond Yau
2010-05-25 8:38 ` Clemens Ladisch
2010-05-25 8:43 ` James Courtier-Dutton
2010-05-25 8:49 ` Clemens Ladisch
2010-05-25 23:24 ` Raymond Yau [this message]
2010-05-27 13:32 ` Colin Guthrie
2010-05-29 3:54 ` Raymond Yau
2010-05-29 1:57 ` Raymond Yau
2010-05-29 18:46 ` Colin Guthrie
2010-06-04 23:46 ` Raymond Yau
[not found] ` <AANLkTik7mD1DAVWkOwM7sNu0EfgGApvzX9WRXWBOO4PI@mail.gmail.com>
2010-05-25 8:45 ` Clemens Ladisch
2010-05-25 13:51 ` Raymond Yau
2010-05-25 14:36 ` Clemens Ladisch
2010-05-25 23:00 ` Raymond Yau
2010-05-27 0:20 ` Raymond Yau
2010-05-28 13:04 ` Raymond Yau
2010-05-28 14:10 ` Clemens Ladisch
2010-05-29 1:31 ` Raymond Yau
2010-05-21 13:16 ` James Courtier-Dutton
2010-05-25 8:21 ` Clemens Ladisch
2010-06-09 6:19 ` Raymond Yau
2010-05-22 9:24 ` Raymond Yau
2010-05-20 9:20 ` Sebastian H.
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