The screen from the UFX+ in 192khz

Thanks.

Ok, that's the chapter 39.7 ?

in total mix i have -105 at 44,1khz , -95 at 96khz and -68 at 192Khz.

when i turn on the RMS meter i have

44,1khz -114
96khz-105
192Khz -78,5

on the analog inputs.

here the pic in 192khz

And i have read the chapter about the noise level.

Thanks

I think what you're seeing may be the ADC noise shaping, they just move the noise above audibility:

"For applications where a full Nyquist bandwidth is not needed, alternate ADC architectures can be implemented. Band-pass continuous-time sigma-delta (CTΣΔ or CTSD) ADCs use a noise shaping function that essentially “pushes” or filters the in-band quantization noise out of the frequency band of interest (Fig. 3). This causes the noise transfer function to have a non-flat shape that is notched lower over a narrow band of interest, smaller than the Nyquist bandwidth. In this band, the CTSD ADC operates to its maximum performance where the SNRFS is the highest (Fig. 4)."

Scroll down to figure 4:

http://electronicdesign.com/adc/noise-s … adc-metric

And it's important to note, -80dB at 81kHz is superior to the best analog tape recorders that barely hit that noise figure even in the audible band.

Anybody here remember tape hiss?