Thanks for your response. I find it a bit surprising that drivers
do the int<->float conversions, but I suppose this could be useful
if they can manage that on hardware. Still, Core Audio provides
converters for this purpose, and presumably those are canonical and
maybe could be used by the drivers. I presume that these use power
of 2 multiplication/division as well.
FWIW, many other transforms are bit-transparent as well. I've done
some testing and
2^n
2^(n-1)
and several other transforms are bit transparent up to 24-bits as
well. I will report back when I've posted my results.
Here's my survey of what's happening on other platforms and what's
bit-transparent:
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