Cubase Processing Precision, 32 Bit or 64 Bit?

[Louis_R]

@jwatte

Constant conversion back and forth may eventually degrade the signal, in theory, but in practice you’d need so many plugins that you couldn’t plug in enough screens just to fit the name of all of them for that to matter.

So what you are saying is that the signal remains at its original bit depth after exiting a plugin ?

On another Topic I got told :
(expand the quote so see my original statement)

@Heinrich_Hohl

No. The math will happen in the 64 bit range, but the result will not be truncated to lower bit depth. The result will be output in 32 or 64 bit float format, depending on your Cubase setting.

Here @KHS seems to be on the same opinion that the signal is converted to the internal 32 or 64 bit FP for the whole signal chain.

What is the definitive answer ?
Is the signal actually converted to Cubase internal bit depth in between plugins and processing, or is the internal bit depth only used during mathematical operations and the actual signal always stays to its original bit depth when the processing has been done ?