[alsa-devel] 2 speakers are assigned to the same DAC, this can't support 4.0/2.1 channles

[Hui Wang]

On 06/12/2015 09:34 AM, Raymond Yau wrote:
>>>> The alsa-info.txt for that Dell machine is at
>>> http://pastebin.ubuntu.com/11667982/
>>>
>>> The subwoofer is also at mono pin complex, are  there any low pass filter
>>> for the subwoofer or vendor coeff need to be set ?
>> I don't know it, I guess there is no hardware filter, it will work with
> the software low pass filter in the pulseaudio.
> The funcional block diagram indicate equaliser is only connected to port D
> This mean only the internal speaker can use high pass filter
>
> Do you mean your can hear high frequency from the subwoofer of alc255 ?
I am not sure about it, but enable/disable the SW lfe filter will make 
the sound of subwoofer different
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel at alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
>