sony-vaio-z-series team mailing list archive

[Rob Mukai <dothedog2010@xxxxxxxxx>]

Thanks for the replies. Looking on the sonystyle website it calls it:


   - VAIO® digital noise cancelling processor

So what are the chances that it is proprietary? pretty high I would guess.
But  I wonder if there are any open source  firmware/driver rocket
scientists out there that could figure it out? Maybe put it out there as a
feature request in the alsa bugtracker?

dothedog


On Thu, Jan 19, 2012 at 3:31 AM, Wouter van der Graaf <wouter@xxxxxxxxx>wrote:

> This is a feature on the Vaio Z13 as well. Audio card is a Realtek ALC889.
> In Windows you can enable noise cancelling in the control software, but I
> don't know what this does; enable hardware noise cancelling or start
> software that drives this behaviour?
>
> I would love this feature to be available in Linux :-) Who knows how to
> find out how this works?
>
> Wouter
>
>
> Op do 19 jan 2012 10:04:57 CET, Frederic BERIER schreef:
>
>  Hello Nicklas,
>>
>> That's not so simple. Noise cancellation is acquiring the ambiant noise,
>> and then adding it to the output with an oposite phase to the ambiant noise.
>> I would say it is done by the hardware because of short delays.
>>
>> regards
>> Frederic
>>
>> Le 19/01/2012 08:50, Nicklas Overgaard a écrit :
>>
>>> Hi Rob,
>>>
>>> I guess the noise cancellation could be done at driver level in windows?
>>>
>>> It's something like measuring a baseline (with the noise) then measuring
>>> while you speak, and substract these signals from eachother to gain a
>>> clearer speech. I would do that in the driver :)
>>>
>>> So that would be alsa that needs an update, I guess...
>>>
>>> /Nicklas
>>>
>>> On 2012-01-18 15:03, Rob Mukai wrote:
>>>
>>>> Hi All,
>>>> So I took my z21 on an airplane last week and found that the noise
>>>> canceling headphones don't work in linux. They work pretty well in Windows.
>>>> Any thoughts on what would be needed to get these to work? It would be
>>>> great to be able to just bring the noise canceling ear buds instead of the
>>>> big noise canceling over the ear headphones I usually take. It appears that
>>>> the microphone is in the ear bud itself but the noise canceling is done in
>>>> the sound card? Is this a firmware thing? There really is no way to
>>>> configure this in Windoze so I imagine it just runs out of firmware?
>>>> Thoughts?
>>>>
>>>> DoTheDog
>>>>
>>>>
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>
>
> --
> Wouter van der Graaf
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