I did a signal-to-noise test by recording 3kHz on a zoom portable recorder and winding down the level until I could no longer hear it above the hiss when replayed in Reaper. When recorded in 16 bits the results were very close to what one would expect from 16 bits, that is to say 96dB. But when I repeated the test recording in 24 bits the results were almost exactly the same, though the noise should have been 48dB better. What is happening here? Will Reaper not replay 24 bit recordings? Or am I wrong in assuming 24 bits is 48dB quieter than 16 bits?