Receiving Data from a hardware component

I want to connect to a hardware component specifically the mouth piece to receive sound and the camera to read images. how can i do this?
FYI typically what you are really doing is
your program -> talks to library -> talks to drivers -> talks to hardware. Talking directly to hardware is extremely involved for complex data like video/sound. You can talk directly to very simple devices with minimal effort (like a simple joystick), anything else is either going to be a big project in and of itself or using someone else's solution.

your program -> talks to library -> talks to drivers -> talks to hardware

Exactly! You definitely don't want to struggle with the details yourself (unless that's your thing!).
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