From: hwang4 <hui.wang@canonical.com>
To: Raymond Yau <superquad.vortex2@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>,
ALSA Development Mailing List <alsa-devel@alsa-project.org>,
David Henningsson <david.henningsson@canonical.com>
Subject: Re: 2 speakers are assigned to the same DAC, this can't support 4.0/2.1 channles
Date: Wed, 10 Jun 2015 14:42:44 +0800 [thread overview]
Message-ID: <5577DC64.8050901@canonical.com> (raw)
In-Reply-To: <CAN8cciY3w+6NZOutzDJZHgHV2Q_LeZqD6zeEwy=tis7aff0tDQ@mail.gmail.com>
On 2015年06月10日 12:59, 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.
> >>
>
> http://www.realtek.com.tw/products/productsView.aspx?Langid=1&PFid=27&Level=5&Conn=4&ProdID=166
>
> The ALC269 integrates five hardware equalizer bands composed of one
> low-pass filter, one high-pass filter, and three band-pass filters to
> compensate for mini-speaker frequency response
>
> Do you mean alc255 does not have tbr hardware equalizer ?
>
I don't have alc255 datasheet, but according to the alc269 feature
description, it is highly possible that alc255 also has hardware equalizer.
And do you know how to control those equalizer filters with software or
do you know where we can find the detailed document for this part?
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next prev parent reply other threads:[~2015-06-10 6:42 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-09 9:38 2 speakers are assigned to the same DAC, this can't support 4.0/2.1 channles hwang4
2015-06-09 11:50 ` Raymond Yau
2015-06-09 13:20 ` Hui Wang
2015-06-10 1:30 ` Raymond Yau
2015-06-10 3:18 ` hwang4
2015-06-11 1:15 ` Raymond Yau
2015-06-11 2:15 ` Hui Wang
2015-06-11 7:37 ` Raymond Yau
2015-06-11 8:33 ` Hui Wang
2015-06-11 16:44 ` Raymond Yau
2015-06-10 4:59 ` Raymond Yau
2015-06-10 6:42 ` hwang4 [this message]
2015-06-12 1:34 ` Raymond Yau
2015-06-12 3:32 ` Hui Wang
2015-06-09 11:51 ` Takashi Iwai
2015-06-09 13:26 ` Hui Wang
2015-06-10 4:19 ` hwang4
2015-06-10 10:28 ` Takashi Iwai
2015-06-11 15:10 ` Takashi Iwai
2015-06-12 1:07 ` Hui Wang
2015-06-12 1:22 ` Raymond Yau
2015-06-12 3:25 ` Hui Wang
2015-06-12 4:42 ` Raymond Yau
2015-06-12 6:07 ` David Henningsson
2015-06-12 9:40 ` Raymond Yau
2015-06-12 16:05 ` Takashi Iwai
2015-06-13 2:43 ` Raymond Yau
2015-06-14 6:48 ` Raymond Yau
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