Which microphone to choose for recording conversations in the office?

Question

Software and Internet Services

Good afternoon!
There are 3 rooms 10x10
. It is necessary to record conversations of employees in these rooms.
What microphone to buy?
How many do you need?
What mixer?
The sound must be clear and of excellent quality.
Cameras work too

Answer 1

#!/usr/bin/python3
from string import ascii_uppercase as A, digits as D
from random import choice

print('-'.join(map(lambda s: ''.join(choice(s) for _ in '1234'), [D, A, D, A])))

Answer 2

Go to https://www.lua.org/cgi-bin/demo
Paste this code there:

math.randomseed(os.time())
d='0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ' --36
function c() x=math.random(1,36) return d:sub(x,x) end
function s() return c()..c()..c()..c() end
print(s().."-"..s().."-"..s().."-"..s())

And click "run".
Such a crutch can be written in any convenient language in 5 minutes.