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Partial answer:
You have standard Intel HDA sound controller. Connected to this is a Creative CA0132 codec chip (codec = coder/decoder). This chip looks a bit unusual, and ALSA already picks up quite a few features you don't see on other codecs.
Googling for this chip finds e.g. this, so it appears the codec driver in the kernel is still under quite a bit of ...
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A monitor is a "child" source/sink associated with a particular "parent" sink/source, respectively.
A monitor source can be used to record a copy of the signal its parent sink is outputting.
A monitor sink could be used to output a copy of the signal that is being recorded by the parent source.
Your Sink #11 is alsa_output.pci-0000_09_00....
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I just ran into this - couldn't figure out why my video was always 3s behind, no matter what options I used. Then I noticed the start times:
Input #0, x11grab, from ':10.0':
Duration: N/A, start: 1627448930.994615, bitrate: N/A
Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 25 fps, 25.08 tbr, 1000k tbn, 1000k tbc
Input #1, pulse, ...
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