Is this a effect that happens when it goes to tape or in the converter itself? In other words, if I record I get 16, but what do I get if I only use the A/D's and route a signal from line in to optical out ?
I know that when I routed a 24-bit signal thru the the XT20s, it was truncated to 20-bit (even though the signal didn't pass thru the A/D converters), so I suspect it would be the same for the older XTs............