[Zero10]

The first sound kind of sounds like a deteriorating catalytic converter, or perhaps a mount on it or the exhaust has cracked or come loose?
I didn't know there was a heat shield on the cat of non-turbo cars.
Although, since it only happens at around 4000rpm on engine deceleration, it could be something else?

The second one could be an idler pulley or tensioner. But it could also be the alternator, power steering pump or ac compressor. Check it out with a stethoscope to be sure.