DCS dCS 904 Manuel D’Utilisation
dCS 904 User Manual
Manual for Software Version 1.5x and 1.36
dCS Ltd
June 2000
Manual part no: DOC135904 iss 2B2
Page 43
135904ma2b2.pdf file available from website
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dCS
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(inside the UK replace + 44 with 0)
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9th Order Noise Shape Plots
-84
-78
-72
-66
-60
-54
-48
-42
-36
-30
-24
-18
-12
-6
0
6
12
18
24
30
36
1
10
100
Frequency (kHz)
N
oi
se A
m
pl
itude
(
d
B
)
32 kS/s
44.1 kS/s
48 kS/s
88.2 kS/s
96 kS/s
176.4 kS/s
192 kS/s
44.1 kS/s
48 kS/s
88.2 kS/s
96 kS/s
176.4 kS/s
192 kS/s
Figure 26 – 9
th
Order Noise Shapers implemented on dCS 904
The noise shaper plots above are all on the same vertical scales for easy
comparison, and the vertical grid is approximately 1 bit per grid line. Note that
for the audio band, 9
comparison, and the vertical grid is approximately 1 bit per grid line. Note that
for the audio band, 9
th
order noise shaping at 176.4 kS/s or 192 kS/s gives huge
gains (8 bits or more).
This means that recording these formats on 8 channel 44.1 kS/s or 48 kS/s
recording machines that store only 16 bits is quite practical, and there is, in
practice, very little quality loss.
recording machines that store only 16 bits is quite practical, and there is, in
practice, very little quality loss.