DCS dCS 974 User Manual
dCS 974 User Manual
Manual for Software Version 1.0x
dCS Ltd
May 2001
Manual part no: DOC1241121A1
Page 19
Document No: OS-MA-A0124-112.1A1
Contact
dCS
on + 44 1799 531 999
email to: more@dcsltd.co.uk
(inside the UK replace + 44 with 0)
web site: www.dcsltd.co.uk
Step 5 – Reducing the Output Wordlength
If you are using
Pure Format Conversion
or DSD output modes, the Output
Wordlength cannot be changed. Proceed to Other Settings.
If you are performing a sample rate conversion with PCM outputs, the
destination equipment can handle 24 bit data and you do not want to reduce the
wordlength then leave the
destination equipment can handle 24 bit data and you do not want to reduce the
wordlength then leave the
Output Wordlength
set to the default of
24
bits and
set
Dither
to
Off
. Proceed to Other Settings.
The dCS 974 generates 24 bit data, regardless of the input word length. If the
destination equipment cannot handle 24 bit data, the
destination equipment cannot handle 24 bit data, the
Output Wordlength
MUST be set to match.
Noise Shaping
and/or
Dither
MUST be applied to
smooth the transitions. If the extra bits are just ignored, the audio outputs may
sound grainy and unpleasant low effects will result. For more information, see
sound grainy and unpleasant low effects will result. For more information, see
do this:
Check the maximum input wordlength specification in the manual for the
destination equipment. You must set the dCS 974 to match this.
destination equipment. You must set the dCS 974 to match this.
TOP LEVEL
Sample Rate Conversion
Audio Input Select
Sync Source
Multi-Channel Sync
Input Sample Rate
24
Default
Output Sample Rate
23
Output Mode
...
Filter
8
Output Wordlength
Noise Shaping
Off
Default
Dither
1st Order
AES Message Edit
...
10th Order
Off
Default
Top Hat
Triangular
NS Triangular
Figure 5 – Setting Wordlength, Noise Shaping and Dither
do this:
Scroll down the
Sample Rate Conversion
menu to
Output Wordlength
and
press the
→
→
→
→
button. Scroll down the list to the required number of output bits
and press
Set
.
do this:
Scroll down the
Sample Rate Conversion
menu to
Noise Shaping
and press
the
→
→
→
→
button. From the list below, choose a suitable setting to match the
Output Wordlength
:
• for
22
or
23
bits, scroll to
2nd order
and press
Set
.
• for
20
or
21
bits, scroll to
3rd order
and press
Set
.
• for
16, 17,
18
or
19
bits, scroll to
9th order
and press
Set
.
do this:
For
16
or
17
bits, scroll down the
Sample Rate Conversion
menu to
Dither
and press the
→
→
→
→
button. Scroll down to
NS Triangular
and press
Set
.