I was wrong about the 32bit thing, something I read got me thinking that way, have to look that up again.
Studio One has 32bit internal processing( or 64bits),
It does convert whatever you import to the working sample rate and I think bit depth.
Cubase does that too.
From the S1 forum:
intermediate files that Studio One creates when you bounce files (or when you use Transform to Audio Track for a virtual instrument). If you inspect bounced (and transformed) files in the Pool, you can see that all your bounced (and transformed) files will be 32 bit. They will be 32 bit regardless of what resolution they were originally recorded as (no matter if 16 bit, 24 bit or 32 bit floating point is chosen Resolution set in Song Setup).