Recording from 24-bit sources

When recording with Audacity from a 24-bit digital source (in my case with
S/PDIF), someone said that only 16 bits are recorded, padded with 8 zeroes.
Is this true? I'm using Audacity 2.0.5.

I should be able to answer my question myself by just zooming in
vertically, but for some reason I can't zoom in enough. After zooming a few
times nothing more happens. The text for the vertical scale is then graded
-0.045 – 0.045 in steps of 0.005, and each mm, when a channel is stretched
all over my screen, seems so be a little less than 0.0005, which is
approximately the size of LSB of an 11-bit signal. For 24-bits, LSB is
approximately 59.6×10⁻⁹ (0.0000000596).

Is there a newer version that allows me to zoom in vertically as much as I
want, at least so I'm able to see if a signal comes from a 16 or 24 bit
source?

And is there a version that lets me see the vertical scale in dB (0
dB=1.0)? Or is it possible in 2.0.5? At least I couldn't find out how.


Kind regards

Johnny Rosenberg

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