[sdiy] Good 16 bits A/D choice for mono audio recording

[John Mahoney]

>Assuming a +/- 1V signal swing, a single bit is around 0.1uV at 24 bits.
>
>This is pretty much impossible to engineer, especially considering
>the equivalent circuit SNR has to be better than 144dB.

If the signal swing were 10 or 20 volts (whatever the +4 pro audio 
signal level is), and it was divided down to 2V p-p at the input to 
the converter, would that help?

Regardless, a 144dB SNR seems -- as you said -- virtually impossible 
to achieve. The LSBs are just dither, I guess! (As Eric sort of said.)

By the way... If you are driving a 24-bit ADC with a -20dB signal, 
how many bits are you "using"? About 20? You get about 6dB per bit, 
as I recall.

Is Ken Pohlmann's digital audio book still a worthy read?
--
john <--(asks a lot of questions for someone born in New Jersey...)


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