Not sure if you've ever faced a bowling machine but that is EXACTLY how they sound, because the balls aren't leather. They are this (not necessarily yellow but normally a bright colour as they are used indoors normally)
You can put cricket balls in a bowling machine but they don't work as well. The way a bowling machine achieves swing is similar to a golf ball (hence the dimples) and not like a cricket ball where you use the seam.
These balls are also a lot more durable. If you only used cricket balls in bowling machines it'd be very expensive. They're also not as good for the machine.
Interesting. I've played the game with the leather ball as a teenager and in the nets back then a couple of times but never with a machine.
Kudos to them if they've gone through the trouble of capturing the net sound and making it authentic.
That means the real game ball sounds would sound....er.. real. If so, excellent.