dCS Vivaldi DAC
User Manual
Software Issue 1.0x
August 2012
Filename: Vivaldi DAC Manual v1_0x.docx
Page 28
English
version
SETTINGS
Menu
Sync Mode
– this page sets the clocking for the digital input that is currently selected.
The DAC remembers the
Sync Mode
setting separately for each digital input. The
options are:
Audio
– The DAC extracts the clock from the data stream connected to the selected
digital input and locks to it. Use this setting for sources that do not have a suitable Word
Clock input. This arrangement does NOT give the best jitter performance or the best
sound quality.
Master
– The DAC uses its own stable 44.1kHz clock and outputs the same clock on the
Word Clock Out
put, so that the source can lock to the DAC. For correct master mode
operation, the source equipment MUST be locked to the DAC. This is the recommended
setting if you have a
Vivaldi
Transport, but not a
Vivaldi
Clock.
If the data rate is not 44.1, 88.2, 176.4 or 352.8kS/s or DSD, Master Mode is not
available. The icon turns red and the DAC defaults to
Audio
sync.
!
The SDIF input cannot be set to Master mode unless the DAC is locked to a 44.1 or
88.2kHz word clock connected to
Word Clock In1
.
Auto
– This mode is designed for easy operation with a Vivaldi Clock, Upsampler and
computer, where the data rate may keep changing. Connect the
Word Clock In1
input
to a Clock output set to 44.1 or 88.2 or 176.4kHz and connect the
Word Clock In2
input
to a Clock output set to 48, 96 or 192kHz. The Upsampler’s Word Clock inputs should be
connected similarly. When the sample rate changes, the DAC and Upsampler will
automatically select a Word Clock frequency that is synchronous with the data. The
selected word clock is displayed.
Word Clock In1
– The DAC locks to an external clock connected to
Word Clock In1
.
Word Clock In 2
– The DAC locks to an external clock connected to
Word Clock In2
.
Word Clock In 3
– The DAC locks to an external clock connected to
Word Clock In3
.
If the DAC cannot find a word clock that is synchronous with the data, it will default to
Audio
sync and display the “Bad Clock” icon.
Output Level
- sets the full scale output level to
2V
rms or
6V
rms. When you set up
your system, choose the
Output Level
setting that gives a comfortable listening level with
the
Volume
set between
–10dB
and
–30dB
. The difference between the two settings is
about 10dB.
