From: Peter Ujfalusi <peter.ujfalusi@ti.com>
To: Rajeev kumar <rajeev-dlh.kumar@st.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
Mark Brown <broonie@opensource.wolfsonmicro.com>
Subject: Re: Audio codec volume control
Date: Thu, 20 Sep 2012 13:19:01 +0300 [thread overview]
Message-ID: <505AED95.20400@ti.com> (raw)
In-Reply-To: <505AEB19.7080205@st.com>
On 09/20/2012 01:08 PM, Rajeev kumar wrote:
>> case 3:
>> 1. Provide master volume control
>> 2. stereo volume control for the left/right channel
>>
>
> You mean to say
> Left and Right should be a single stereo control which can be provided with
> SOC_DOUBLE. Actually case 2 corresponds to the same setting which you are
> suggesting.
>
> But why this is better option?
You have less controls for the codec -> easier for users.
Users still can adjust the left/right differently if they want.
> In case user wants a separate left/right volume control then how this setting
> is going to help.
In most cases you change both left/right channel:
amixer sset 'PCM' 8 # left/right volume is 8
but users can set different volume per channel:
amixer sset 'PCM' 8,1 # left volume is 8, right is 1
it is better than:
amixer sset 'PCM Left' 8 # left volume is 8
amixer sset 'PCM Right' 8 # left volume is 8
or
amixer sset 'PCM Left' 8 # left volume is 8
amixer sset 'PCM Right' 1 # left volume is 1
--
Péter
next prev parent reply other threads:[~2012-09-20 10:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-20 7:56 Audio codec volume control Rajeev kumar
2012-09-20 9:58 ` Peter Ujfalusi
2012-09-20 10:08 ` Rajeev kumar
2012-09-20 10:19 ` Peter Ujfalusi [this message]
2012-09-20 10:39 ` Rajeev kumar
2012-09-20 10:46 ` Peter Ujfalusi
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