[alsa-devel] [PATCH] ALSA: hda - limit mic boost on Asus UX31[A, E]

Oleksij Rempel linux at rempel-privat.de
Thu Nov 28 10:48:49 CET 2013

Am 27.11.2013 18:59, schrieb Oleksij Rempel:
> Am 27.11.2013 17:18, schrieb Takashi Iwai:
>> At Wed, 27 Nov 2013 17:12:03 +0100,
>> Oleksij Rempel wrote:
>>> This both devices need limit for internal dmic.
>>> Signed-off-by: Oleksij Rempel <linux at rempel-privat.de>
>> Ah, you have this Zenbook.  While I'll take your patch, yet a
>> counter-question to you:
>> I got a bug report complaining that the output level on this (or
>> similar) machine is too low compared with Windows.  Is it so on yours,
>> too?
> I'll check it ASAP ;)
>> If so, does the patch below make the level equivalent?
>> The reporter isn't responsive, so need more better testing...
>> BTW, I'd suggest to name the new fixup in your patch as
>> does.

Hi right now i did only one test:
On sender and reciver i use audacity to generate 1000Hz signal and to
capture it for measuring.
For microphone i use logitech c905 webcam. Distance between right
speaker and mic is 24cm.

Windows and Linux was configured for maximal volume. On  linux i use
maximal alsa volume, not pulse. On windows no plugins are used.
Windwos 7 64bit, latest realtek driver.
Ubuntu Linux 13.10, kernel 3.12.0-031200rc6-generic.

Both Windows and Linux have same volume. Check attachment in audacity.

Reported issue may be result of enabled compressor plugin on windows.

I will need some more time to test in on UX31A, there is no windows on
this machine.

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