[LAU] Sample rate vs. SNR

Just looking through TI's ADCs 96k and up. Any on chip audio circuitry (level controls etc.) seems to lower SNR (101 db typ.) which is no surprise. But what I did find interesting is that even 96k and 192k devices seem to optimized for 48k. So the spec of 112db SNR would be true for 48k, but by the time it gets to 96k that is down 3db (noise floor up 3db) and at 192k... not even listed. So 192k is snake oil anyway, I'm not concerned, though I will say the 192k device has better performance at 48K, much smoother frequency response. My question is about the 48k vs. 96k. 96k would allow lower latency and better in band frequency response, but worse noise. Is it worth the extra disk space and cpu load for recording? Or would it be better to record at 48K and use 96K for live use where latency is more important than noise floor? What is the best SNR I am practically going to find from mic to converter? Does it matter if the ADC is 101 db SNR or 112 db SNR? -- Len Ovens www.OvenWerks.net