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.