From: James Courtier-Dutton <james.dutton@gmail.com>
To: "Sebastian H." <vand2@gmx.de>
Cc: alsa-devel@alsa-project.org
Subject: Re: Mixer volume/decibel mapping
Date: Thu, 20 May 2010 09:01:37 +0100 [thread overview]
Message-ID: <AANLkTimQtKql4p3UEs2Wh_tZ6YhzLGgl1q5G18A1y9Jk@mail.gmail.com> (raw)
In-Reply-To: <201005191834.57919.vand2@gmx.de>
On 19 May 2010 17:34, Sebastian H. <vand2@gmx.de> wrote:
>
> Hello everyone
>
> I'm working on an ALSA-Mixer application for C++/Qt4 and stumbled over
> volume and decibel mapping for sliders.
> My question: Is there always an 1 to 1 mapping from volume to decibel and vice
> versa or can there be decibel values in between two volume steps?
>
There should be a one to one mapping.
If the hardware has 200 steps on the volume scale, and those 200 steps
are published to the user.
With the dB scale, there will still be the same 200 steps in the dB scale.
The dB information simply helps the user interface convert each step
into a dB value.
next prev parent reply other threads:[~2010-05-20 8:01 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 [this message]
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
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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