Choose a dither, or truncate in 20-24 bits?

[deleted user]

I haven't done extensive tests but at the higher settings it's definitely audible like you said. The noise shaping is also audible at high levels imo, you can tell the high frequencies are getting more noise.

At low settings I think it might be inaudible, but I haven't done any deeper tests I think.

Yeah that's probably the next best thing if you're at 16 bit target depth.