HW Pull Up/Down

Hello, In page 14 of the user manual for Cubase Pro 10, where it explains the VST Audio System Page, I read:

“HW Pull Up/Down
Shows the pull up/down status of the audio hardware.”

I have not found any explanation about the meaning of this in the rest of the manual.

Con somebody explain to me what is this, how to use it and in what circumstances?

Many thanks for your help.



Maybe this thread could help.