On Tue, 17 Jan 2017 13:42:34 +0000, dennis@home wrote:

Also, it was never simple making a good sounding RIAA preamp. Let
alone
one which does that for a USB input.

It doesn't need to though.
You just post process the digital to correct it.

Assuming that recording pre the horrendous RIAA equalisation you can
get a decent enough digital representation that doesn't go all nasty
when corrected in the digital domain. There is 40 dB difference in
level between the LF and HF ends. 16 bit encoding might struggle,
that only has a 96 dB dynamic range, doesn't leave a lot of space
with 30 to 40 dB dyanmic range of an LP. 24 bit would be OK. B-)

--
Cheers
Dave.