Voice slow and garbled if Macbook Pro M1 is closed and I am using external mic (RODE NT USB)

[remoteworker.id]

I use Macbook M1 Pro 16" in Sonoma (beta). Recorded voice just fine if I use Macbook internal speaker.
But when I close it and use external usb mic (RODE NT) .. recorded voice become slow and garbled.
Here it is: https://youtu.be/eLbhLxjLgjQ

I don't use any filter or setup. All just default recording setup from OBS
Any suggestion/

 

[remoteworker.id]

SOLVED!

I just realize I haven't add Audio Input sources. Turn out, if macbook opened, I can us the Audio Mixer only. But if it is closed, I need to add Audio Input Sources and use my mic from there.

Phew!