[alsa-devel] Selecting correct input device port.

[dE]

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...?