What's the purpose of these sound devices?

Legacy Products Controllers
1

When I installed the driver I get these audio drivers installed.

“Speakers Denon DJ MC4000” “Line 1/2 Denon DJ MC4000” “Line 3/4 Denon DJ MC4000”

any idea how to use them or what are they for?

2

You have 4 channels output (1/2 is master, 3/4 is Your headphones). Operating system of Your computer can also see the unit it self as one combined soundcard - speakers denon mc4000

3

I think I get it, but, if you could give me an example of usage I’ll really appreciate it

4

lo estaras usando cuando uses el controlador

5

sigo sin entender cómo o su función