[alsa-devel] Verifying mixer dB data/Invalid dB data from USB cards, especially Aureon 5.1 MkII

Jaroslav Kysela perex at perex.cz
Sat Feb 20 09:41:59 CET 2010

On Fri, 19 Feb 2010, James Courtier-Dutton wrote:

> On 19 February 2010 08:17, Jaroslav Kysela <perex at perex.cz> wrote:
>> On Thu, 18 Feb 2010, Lennart Poettering wrote:
>>>> For the Mic Boost +20dB case , how PA handle this +20dB switch in the "Flat
>>>> Volume" model if you did not expost the Mic Boost switch to the user in the
>>>> mixer control ?
>>>> +20dB is quite significant in with the Capture Volume control
>>> We currently don't cover boost switches, simply because tehre is no dB
>>> data queriable for them.
>>> I'd really prefer if those boost switches would be turned into binary
>>> volume elements which carry normal dB information like any other
>>> volume element. After all they are just a volume element, with only
>>> two steps.
>> I like this idea.
> Seems like a good idea but what should we call it.
> If we already have a mic capture gain control, what shall we call the
> mic boost gain control so as not to confuse it with each other?
> Would keeping its current name be OK?

I would keep the Boost suffix. It's easy to understand.


Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.

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