Can I use ALSA to record a beamforming wav?

Hi, everyone
I am a beginner to use Matrix Creater. I want to konw when i use this command :
arecord --device=mic_channel8 -r 16000 -c 1 -f S16_LE test.wav
I will get a test.wav, is this wav is result from beamforming ? when use mic_channel0-7 to record a wav is result from single channel?

Any help or suggestion is very welcome!

As of my understanding: Yes. Yes.

thank you :grinning: