From: Lennart Poettering <mznyfn@0pointer.de>
To: Jaroslav Kysela <perex@perex.cz>
Cc: alsa-devel@alsa-project.org
Subject: Re: Verifying mixer dB data/Invalid dB data from USB cards, especially Aureon 5.1 MkII
Date: Wed, 17 Feb 2010 14:06:12 +0100 [thread overview]
Message-ID: <20100217130612.GD24165@tango.0pointer.de> (raw)
In-Reply-To: <alpine.LNX.2.00.1002170924570.28127@eeebox2.perex-int.cz>
On Wed, 17.02.10 10:04, Jaroslav Kysela (perex@perex.cz) wrote:
> The second question is if the represented dB range and scale reported from
> the driver (hardware and audio chip datasheets) really matches the
> hardware and how we can measure these values. I suspect a lot of trouble
> here, because the analog parts of soundcards might have strange curves -
> it's probably thing you deal with in PA now.
Yes, that is indeed the problem.
For PA I don't care whether the dB curve reported by ALSA might be
shifted relative to some reference level, what matters is that
otherwise the curve reflects properly how volume increases with higher
discrete volume settings.
Lennart
--
Lennart Poettering Red Hat, Inc.
lennart [at] poettering [dot] net
http://0pointer.net/lennart/ GnuPG 0x1A015CC4
next prev parent reply other threads:[~2010-02-17 13:06 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-15 19:24 Verifying mixer dB data/Invalid dB data from USB cards, especially Aureon 5.1 MkII Lennart Poettering
2010-02-16 8:08 ` Clemens Ladisch
2010-02-16 8:24 ` Jaroslav Kysela
2010-02-16 14:32 ` Lennart Poettering
2010-02-16 14:40 ` Mark Brown
2010-02-16 15:40 ` Lennart Poettering
2010-02-16 15:49 ` Mark Brown
2010-02-16 16:29 ` Jaroslav Kysela
2010-02-16 21:07 ` Lennart Poettering
2010-02-16 22:39 ` Mark Brown
2010-02-16 22:42 ` Lennart Poettering
2010-02-16 23:38 ` Mark Brown
2010-02-16 23:56 ` Lennart Poettering
2010-02-17 11:17 ` Mark Brown
2010-02-17 13:01 ` Lennart Poettering
2010-02-17 13:15 ` Mads Kiilerich
2010-02-17 11:55 ` James Courtier-Dutton
2010-02-17 13:06 ` Mark Brown
2010-03-20 7:58 ` Raymond Yau
2010-02-18 1:48 ` Raymond Yau
2010-02-18 2:37 ` Lennart Poettering
2010-02-18 6:15 ` Raymond Yau
2010-02-18 10:11 ` James Courtier-Dutton
2010-02-18 18:13 ` Lennart Poettering
2010-02-19 8:17 ` Jaroslav Kysela
2010-02-19 9:40 ` Mark Brown
2010-02-19 10:57 ` Raymond Yau
2010-02-19 15:13 ` Lennart Poettering
2010-02-21 3:49 ` Raymond Yau
[not found] ` <20100221193933.GA31800@tango.0pointer.de>
2010-02-23 4:47 ` Raymond Yau
2010-02-23 22:20 ` Lennart Poettering
2010-02-24 1:52 ` Raymond Yau
2010-02-28 7:32 ` Raymond Yau
2010-02-23 5:12 ` Raymond Yau
2010-02-23 8:43 ` Raymond Yau
2010-02-21 4:01 ` Raymond Yau
[not found] ` <20100221192951.GD30380@tango.0pointer.de>
2010-02-23 10:08 ` Clemens Ladisch
2010-02-23 12:46 ` Raymond Yau
2010-02-23 22:32 ` Lennart Poettering
2010-02-24 0:57 ` Raymond Yau
2010-02-24 9:00 ` Clemens Ladisch
2010-02-24 11:49 ` Raymond Yau
2010-02-24 12:07 ` Raymond Yau
2010-02-24 1:12 ` Raymond Yau
2010-02-24 3:49 ` Raymond Yau
2010-02-20 8:38 ` Jaroslav Kysela
2010-02-25 3:34 ` Raymond Yau
2010-02-19 11:47 ` James Courtier-Dutton
2010-02-19 15:10 ` Lennart Poettering
2010-02-20 8:41 ` Jaroslav Kysela
2010-02-24 7:30 ` Raymond Yau
2010-02-25 13:14 ` Raymond Yau
2010-02-25 3:51 ` Raymond Yau
2010-02-26 3:17 ` Raymond Yau
2010-03-01 4:21 ` Raymond Yau
2010-02-16 23:47 ` Eliot Blennerhassett
2010-02-17 0:10 ` Lennart Poettering
2010-02-17 0:43 ` Mark Brown
2010-02-17 0:52 ` Eliot Blennerhassett
2010-02-17 11:50 ` Mark Brown
2010-02-17 9:04 ` Jaroslav Kysela
2010-02-17 12:06 ` Mark Brown
2010-02-17 13:15 ` Lennart Poettering
2010-02-17 13:32 ` Mark Brown
2010-02-17 13:06 ` Lennart Poettering [this message]
2010-02-17 13:55 ` James Courtier-Dutton
2010-02-17 14:12 ` Mark Brown
2010-02-17 14:35 ` Lennart Poettering
2010-02-17 16:17 ` James Courtier-Dutton
2010-02-26 9:38 ` Raymond Yau
2010-02-17 7:37 ` Raymond Yau
2010-02-18 2:11 ` Raymond Yau
2010-02-26 0:45 ` Raymond Yau
2010-02-20 7:24 ` Raymond Yau
2010-03-26 4:26 ` Raymond Yau
2010-02-16 21:48 ` James Courtier-Dutton
2010-02-17 8:08 ` Jaroslav Kysela
2010-06-14 3:30 ` Raymond Yau
2010-02-16 16:09 ` Jaroslav Kysela
2010-02-16 14:26 ` Lennart Poettering
2010-02-17 3:30 ` Raymond Yau
2010-02-17 15:19 ` Lennart Poettering
2010-03-08 9:06 ` Raymond Yau
2010-02-16 8:32 ` Jaroslav Kysela
2010-02-16 10:36 ` Jaroslav Kysela
2010-02-17 3:44 ` Raymond Yau
2010-02-17 12:54 ` Lennart Poettering
2010-02-26 5:18 ` Raymond Yau
2010-02-27 1:07 ` Raymond Yau
2010-03-01 0:51 ` Raymond Yau
2010-06-24 22:51 ` Raymond Yau
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