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* Selecting correct input device port.
@ 2014-10-28  4:27 dE
  2014-10-29  3:10 ` dE
                   ` (2 more replies)
  0 siblings, 3 replies; 7+ messages in thread
From: dE @ 2014-10-28  4:27 UTC (permalink / raw)
  To: Alsa-devel

As I learn't in this mailng list, a device can typically handle only one 
stream at a time unless it supports hardware mixing which's exposed via 
subdevices in ALSA

What does subdevice mean for input device? Do they mark physical ports 
for input? If not how do I record from a specific input port? Is it 
automatically selected by the card?

And what's 'input source' in ALSA mixer?

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: Selecting correct input device port.
  2014-10-28  4:27 Selecting correct input device port dE
@ 2014-10-29  3:10 ` dE
  2014-10-29  7:36 ` Takashi Iwai
  2014-10-30  5:08 ` Raymond Yau
  2 siblings, 0 replies; 7+ messages in thread
From: dE @ 2014-10-29  3:10 UTC (permalink / raw)
  To: Alsa-devel

On 10/28/14 09:57, dE wrote:
> As I learn't in this mailng list, a device can typically handle only 
> one stream at a time unless it supports hardware mixing which's 
> exposed via subdevices in ALSA
>
> What does subdevice mean for input device? Do they mark physical ports 
> for input? If not how do I record from a specific input port? Is it 
> automatically selected by the card?
>
> And what's 'input source' in ALSA mixer?

Pointers to any doc...?

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: Selecting correct input device port.
  2014-10-28  4:27 Selecting correct input device port dE
  2014-10-29  3:10 ` dE
@ 2014-10-29  7:36 ` Takashi Iwai
  2014-10-30  4:37   ` dE
  2014-10-30  5:08 ` Raymond Yau
  2 siblings, 1 reply; 7+ messages in thread
From: Takashi Iwai @ 2014-10-29  7:36 UTC (permalink / raw)
  To: dE; +Cc: Alsa-devel

At Tue, 28 Oct 2014 09:57:18 +0530,
dE wrote:
> 
> As I learn't in this mailng list, a device can typically handle only one 
> stream at a time unless it supports hardware mixing which's exposed via 
> subdevices in ALSA
> 
> What does subdevice mean for input device?

When a device can do multiplexing, the driver can give multiple
substreams (= subdevices).

> Do they mark physical ports 
> for input? If not how do I record from a specific input port?

You can pass the subdevice number explicity.  It's -1 as default,
which means to select the next free one.

> Is it 
> automatically selected by the card?
> 
> And what's 'input source' in ALSA mixer?

It's usually a MUX to select the input source, e.g. line in or mic.


Takashi

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: Selecting correct input device port.
  2014-10-29  7:36 ` Takashi Iwai
@ 2014-10-30  4:37   ` dE
  2014-10-30  5:42     ` Raymond Yau
  0 siblings, 1 reply; 7+ messages in thread
From: dE @ 2014-10-30  4:37 UTC (permalink / raw)
  To: Alsa-devel

On 10/29/14 13:06, Takashi Iwai wrote:
> At Tue, 28 Oct 2014 09:57:18 +0530,
> dE wrote:
>>
>> As I learn't in this mailng list, a device can typically handle only one
>> stream at a time unless it supports hardware mixing which's exposed via
>> subdevices in ALSA
>>
>> What does subdevice mean for input device?
>
> When a device can do multiplexing, the driver can give multiple
> substreams (= subdevices).
>
>> Do they mark physical ports
>> for input? If not how do I record from a specific input port?
>
> You can pass the subdevice number explicity.  It's -1 as default,
> which means to select the next free one.
>
>> Is it
>> automatically selected by the card?
>>
>> And what's 'input source' in ALSA mixer?
>
> It's usually a MUX to select the input source, e.g. line in or mic.
>
>
> Takashi
>

Input source for single subdevice right? I've 3 sub device, does it have 
to do anything with the fact that I've 3 input source in alsamixer? Do 
the 3 input source mark 3 different subdevices?

By muxing you mean muxing via software the multiple individual (and 
simultaneous) audio input streams as supported by the cards?

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: Selecting correct input device port.
  2014-10-28  4:27 Selecting correct input device port dE
  2014-10-29  3:10 ` dE
  2014-10-29  7:36 ` Takashi Iwai
@ 2014-10-30  5:08 ` Raymond Yau
  2 siblings, 0 replies; 7+ messages in thread
From: Raymond Yau @ 2014-10-30  5:08 UTC (permalink / raw)
  To: dE; +Cc: Alsa-devel

>
> As I learn't in this mailng list, a device can typically handle only one
stream at a time unless it supports hardware mixing which's exposed via
subdevices in ALSA
>
> What does subdevice mean for input device? Do they mark physical ports
for input? If not how do I record from a specific input port? Is it
automatically selected by the card?
>
> And what's 'input source' in ALSA mixer?

'Input source' usually found in those desktop using hda codec with two or
more ADC since hda support multistreaming

Most sound card only support one analog capture device with 'Capture
Source' control

Most notebook with hda codec have auto mic enabled by default, the capture
source is determined by jack detection

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: Selecting correct input device port.
  2014-10-30  4:37   ` dE
@ 2014-10-30  5:42     ` Raymond Yau
  2014-10-30  9:31       ` dE
  0 siblings, 1 reply; 7+ messages in thread
From: Raymond Yau @ 2014-10-30  5:42 UTC (permalink / raw)
  To: dE; +Cc: Alsa-devel

2014-10-30 下午12:38 於 "dE" <de.techno@gmail.com> 寫道：
>
> On 10/29/14 13:06, Takashi Iwai wrote:
>>
>> At Tue, 28 Oct 2014 09:57:18 +0530,
>> dE wrote:
>>>
>>>
>>> As I learn't in this mailng list, a device can typically handle only one
>>> stream at a time unless it supports hardware mixing which's exposed via
>>> subdevices in ALSA
>>>
>>> What does subdevice mean for input device?
>>
>>
>> When a device can do multiplexing, the driver can give multiple
>> substreams (= subdevices).
>>
>>> Do they mark physical ports
>>> for input? If not how do I record from a specific input port?
>>
>>
>> You can pass the subdevice number explicity.  It's -1 as default,
>> which means to select the next free one.
>>
>>> Is it
>>> automatically selected by the card?
>>>
>>> And what's 'input source' in ALSA mixer?
>>
>>
>> It's usually a MUX to select the input source, e.g. line in or mic.
>>
>>
>
> Input source for single subdevice right? I've 3 sub device, does it have
to do anything with the fact that I've 3 input source in alsamixer? Do the
3 input source mark 3 different subdevices?

So far, only those 10 channel hda codecs have three ADC

Due to recent change in snd-hda-intel, if your desktop previously had three
subdevices, the new driver create analog capture device with one subdevice
and alt analog capture with two subdevices
_______________________________________________
Alsa-devel mailing list
Alsa-devel@alsa-project.org
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: Selecting correct input device port.
  2014-10-30  5:42     ` Raymond Yau
@ 2014-10-30  9:31       ` dE
  0 siblings, 0 replies; 7+ messages in thread
From: dE @ 2014-10-30  9:31 UTC (permalink / raw)
  To: Alsa-devel

On 10/30/14 11:12, Raymond Yau wrote:
>
>
> 2014-10-30 下午12:38 於 "dE" <de.techno@gmail.com 
> <mailto:de.techno@gmail.com>> 寫道：
> >
> > On 10/29/14 13:06, Takashi Iwai wrote:
> >>
> >> At Tue, 28 Oct 2014 09:57:18 +0530,
> >> dE wrote:
> >>>
> >>>
> >>> As I learn't in this mailng list, a device can typically handle 
> only one
> >>> stream at a time unless it supports hardware mixing which's 
> exposed via
> >>> subdevices in ALSA
> >>>
> >>> What does subdevice mean for input device?
> >>
> >>
> >> When a device can do multiplexing, the driver can give multiple
> >> substreams (= subdevices).
> >>
> >>> Do they mark physical ports
> >>> for input? If not how do I record from a specific input port?
> >>
> >>
> >> You can pass the subdevice number explicity.  It's -1 as default,
> >> which means to select the next free one.
> >>
> >>> Is it
> >>> automatically selected by the card?
> >>>
> >>> And what's 'input source' in ALSA mixer?
> >>
> >>
> >> It's usually a MUX to select the input source, e.g. line in or mic.
> >>
> >>
> >
> > Input source for single subdevice right? I've 3 sub device, does it 
> have to do anything with the fact that I've 3 input source in 
> alsamixer? Do the 3 input source mark 3 different subdevices?
>
> So far, only those 10 channel hda codecs have three ADC
>
> Due to recent change in snd-hda-intel, if your desktop previously had 
> three subdevices, the new driver create analog capture device with one 
> subdevice and alt analog capture with two subdevices
>

Thanks for clarifying everyone!

Looks like my mobo is bad.
_______________________________________________
Alsa-devel mailing list
Alsa-devel@alsa-project.org
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

^ permalink raw reply	[flat|nested] 7+ messages in thread
end of thread, other threads:[~2014-10-30  9:32 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-10-28  4:27 Selecting correct input device port dE
2014-10-29  3:10 ` dE
2014-10-29  7:36 ` Takashi Iwai
2014-10-30  4:37   ` dE
2014-10-30  5:42     ` Raymond Yau
2014-10-30  9:31       ` dE
2014-10-30  5:08 ` Raymond Yau

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