2010/2/19 Jaroslav Kysela perex@perex.cz
On Thu, 18 Feb 2010, Lennart Poettering wrote:
For the Mic Boost +20dB case , how PA handle this +20dB switch in the
"Flat
Volume" model if you did not expost the Mic Boost switch to the user in
the
mixer control ?
+20dB is quite significant in with the Capture Volume control
We currently don't cover boost switches, simply because tehre is no dB data queriable for them.
I'd really prefer if those boost switches would be turned into binary volume elements which carry normal dB information like any other volume element. After all they are just a volume element, with only two steps.
I like this idea.
Jaroslav
PA assume every sound card can only record from one capture source at the same time (like those AC97 card )
However HDA support multi streaming capture , the capture device 0 may have more than one subdevice "Capture sources" depend on the codec and device 2 has 2 subdevice for capturing "Input sources" on some codec
Is HDA_SUBDEV_NID_FLAG or any API for the application to find the correct mixer control for these kind of capturing subdevices ? ( simple mixer api is not able to know the subdevice number )