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

Jaroslav Kysela perex at perex.cz
Fri Feb 19 09:17:01 CET 2010

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.


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

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