I suppose that Bob would have to answer that for himself. But I think not. 60 dB is the speaking voice. 0.9 is practically inaudible.

The point is really - if it sounds good it IS good. Many folks still adhere to OLD maxims. Digital levels are a totally different thing than analogue levels. But anyone who wants to quote old axioms are welcome to them.

And still... Bob is a pretty smart guy.