Mytek Digital Stereo 96 ADC (VER.7/sep 2010) - Manual (Page 14)

Mytek “SuperShaper-HR” ™
Noise Shaping and Dither
The Stereo96 A/D converter employs SuperShaper-HR ™ - a
sophisticated psychoacoustically optimized noise shaping and dithering
algorithm. SuperShaper-HR ™ uses 9th order high resolution noise
shaping filters with proprietary filter coefficients developed by Mytek
Inc. The appropriate noiseshaping curve is programmed into
noiseshaping filters. This feature allows for preserving most of 24 bit
performance in 16 bit data output.
Noise shaper performance graphs at 16 bit output
.
When noise-shaping processing is on, the quantization noise is removed
from the audio band, where the noise floor is kept as close as possible to
the 24 bit level, and moved to the 20-22 kHz range.
The noise-shaping filters are automatically engaged at appropriate levels
when 16 bit output marked "Supershaper HR" is selected. If 24 or 20 bit
bit output is selected, the noise-shaping filter is off.
-30dB
-20dB
-10dB
0dB
10dB
20dB
30dB
40dB
50dB
60dB
0H Z 10k 15k 25k 5k 20k
-40dB
E
ff
e
c
ti
v
e
1
9
b
it
p
e
rf
o
rm
a
n
c
e
16 bit noise level
13