From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: 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 00:43:08 +0000 [thread overview]
Message-ID: <20100217004308.GC23623@sirena.org.uk> (raw)
In-Reply-To: <20100217001047.GB6766@tango.0pointer.de>
On Wed, Feb 17, 2010 at 01:10:47AM +0100, Lennart Poettering wrote:
> On Wed, 17.02.10 12:47, Eliot Blennerhassett (linux@audioscience.com) wrote:
> > For our cards this is adjustable, but lets say for consumer cards it is
> > fixed. This information is not currently available via the ALSA
> > API.
> I wonder how realistic it would even be to add an API for
> this. i.e. can we even know the refernce level? On many cards most
> likely not. For example, for my integrated USB speakers speaking of a
> reference voltage would already be misleading...
Like you say even where we know the actual level it's not practically
useful unless it's physically exposed somewhere the user can see it.
For things like line jacks where it is relevant these things do actually
get documented relatively often, and obviously measurements are possible
where they aren't. I'm not sure how interesting it is unless the system
also supports configuration, though.
next prev parent reply other threads:[~2010-02-17 0:43 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 [this message]
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
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100217004308.GC23623@sirena.org.uk \
--to=broonie@opensource.wolfsonmicro.com \
--cc=alsa-devel@alsa-project.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.