Sorry if dumb question, just really curious.

I don't mean where they're taken from, i mean what in the facility is making them?.

There's a few i do know.

Ambience2: SCP-173
Ambience3: Some kind of machine maybe?
Ambience5: Something falling/exploding
Ambience7: Gunfire possibly
Ambience8: Someone walking overhead
Ambience9: Big gates opening
Ambience10: Door opening
Ambience11: SCP-173
Ambience18: Printer or fax machine.

Ambient4: A broken fan
Ambient6: A broken machine
Ambient18: Intercom

All of the ambients are possibly machines

Thanks for answering.

Ambient16/Ambient17: A gust of wind
Ambient13: A broken elevator/dumbwaiter
Ambient14: A radio (possibly guard or another human)

Ambient9 = Maybe SCP-682 walking.
Ambient10 = Someone closing doors. But if you hear this sound before the arrival,that must be the Guards,because they are the only characters alive you encounter,before the arrival.
Ambient13 = Someone trying to recontain SCP-106... But if you hear this sound before the arrival,who that must be ? This would be weird if a guard is containing SCP-106.
Ambient14 = Maybe you hear that sound with the closest Camera around you,trying to recording the room where it is.
Ambient18 = Maybe a SCP-machine ? (I think personally of SCP-212,with its mechanicals arms.)
Ambient19 = Maybe a darkness SCP,like 017 or 280.

I doubt it's 682 walking, probably just a guard or SCP.

These are all interesting analyses

Ambient 6: The Bloop
Ambient 13: Explosion
Ambient 15: Sounds like wind?
Ambient 17: A/C

No clue what Ambient 1 could be, but it sounds so familiar.

I decided to do a whole list of all the ambients.
Ambient1: A wire system over surging (I know this because I heard it in real life before)
Ambient2: SCP-173/rolling stone
Ambient3: A failing machine.
Ambient4: A (broken)fan.
Ambient5: Something heavy falling.
Ambient6: A failing machine.
Ambient7: Gears and pulleys.
Ambient8: SCP(-682), Chaos Insurgency, and/or guards.
Ambient9: A big door being opened.
Ambient10: A door far away being closed.
Ambient11: SCP-173/rolling stone
Ambient12: A machine roaring.
Ambient13: Pulley.
Ambient14: Guard, camera, sound device.
Ambient15: Medium vent blowing out air.
Ambient16: Big vent blowing out air.
Ambient17: Small vent blowing out air.
Ambient18: Intercom.
Ambient19: The lights surging.

Any and all of these can be incorrect.

Well, I can contribute to explaining some of the sounds I did and what they were intended to be.