Do you have a good dealership or indy shop in your area to take the car to? The noise might be from a relatively minor problem but it may be something more serious. The less the engine is run the better until the source of the noise is ID'd.
If you want to attempt to diagnose this yourself, my first advice would be to remove the oil filter housing and carefully dump the oil and filter element into a *clean* drain pan and look carefully at the oil and at and in the filter element. Depending upon what you don't see or do see plays a big role in what you do next.
Assuming you do not see anything scary put in a new filter element and install the filter housing correctly and top up with around 1/2 quart of the same oil that is in the engine.
The noise could be from a noisy idler roller bearing. It could be from a noisy water pump or possibly another accessory drive, but water pumps go bad most often.
Assuming the noise is present when the engine is dead cold, if you want carefully note the belt routing and its direction of rotation then remove the belt and start the cold engine. Run the engine only long enough to confirm the noise is present or not present. If the noise is present still I think you need to get the car to a qualified shop to have this looked into. It might just be a bad AOS and the noise is a squeal from excessive engine crankcase vacuum, but the engine sounds pretty healthy for an AOS to be the explanation.
If the noise is not present then there is a noisy idler roller bearing, a noisy tensioner roller bearing, or a noisy water pump or accessory drive.
If the belt has one (or two) sharp edges my money's on a bad accessory drive. You'll have to around to each in turn and check for excessive play. It may not be lots but it will be more than the other accessory drives have, and they shouldn't have much play.
If the belt is fine still check the accessory drives. But check the idler roller bearing and tensioner roller bearings for any signs of bearing troubles.