dCS
Vivaldi Upsampler User Manual
Software Issue 1.2x
December 2015
Vivaldi Upsampler Manual v1_2x
Page 27
English version
Word Clock Input / Output
Either of the two
Word Clock In
connectors (Q & R) will accept standard word clock from the source
equipment or a master clock at 32, 44.1, 48, 88.2, 96, 176.4 or 192kHz. The clock frequency
MUST
be
an exact multiple of the data rate, otherwise the system will default to
Audio
sync. Use the
Settings > Sync mode
menu page (see page
32
) to lock the selected input to the selected external
word clock. The source
MUST
be locked to the same clock, otherwise the system will not be locked
and periodic clicks or other undesirable noises or dropouts will be heard on the outputs.
The two
Word Clock In
puts may be used individually, but to make operation easier, the Vivaldi
Upsampler’s
Sync mode
menu page features a
Word Clock 1-2 Auto
mode. In this mode you can
connect a 44.1, 88.2 or 176.4kHz word clock to
Word Clock In1
and a 48, 96 or 192kHz word clock to
Word Clock In2
. With a source connected to another feed from the same Clock, the Upsampler can
select the correct clock frequency.
When the USB or Network interfaces are in use, the Upsampler can be locked to a 38.4kHz clock
generated by a Vivaldi DAC (v1.10 or later) set to
Universal Master Mode
.
The
Word Clock Out
connector (S) carries word clock as follows:
•
Single wire output – Word Clock Output frequency is the same as the sample rate.
•
Dual AES output 88.2 to 192kS/s - Word Clock Output frequency is 0.5 x the sample rate.
•
Dual AES output 352.8 or 384kS/s - Word Clock Output frequency is 0.25 x the sample rate.
•
DSD output mode - Word Clock Output frequency is 44.1kHz.
Word Clock is used for synchronisation only, it does not carry digital data.
Network Interface
The
Network
connection on an RJ45 socket (U) acts as a UPnP
TM
renderer, streaming music data
from a NAS drive or a local computer over a standard Ethernet network. The Upsampler can stream
music files at up to 24 bits / 192kS/s under the control of a
dCS
Vivaldi HD App running on a suitable
iPad, iPhone, iPod Touch, (see page
18
) or other UPnP control point.
The
dCS
App for Android tablets is currently in development.
The Upsampler can stream DSD/64 in DoP format via the Network interface but it relies
on the Server to perform the packaging of DFF/DSF/ISO files into DoP format. At the
time of writing, this function is available from a Buffalo LinkStation NAS, or Minimserver
loaded on a Synology or a QNAP NAS.
!
The RJ45 socket’s contacts can be damaged by accidentally inserting the wrong
connector (e.g. a USB type B or type A). To avoid this, we suggest leaving the dust
cover fitted when not in use and fitting the RJ45 cable immediately after removal.
USB Interfaces
Both USB interfaces operate in True Asynchronous USB mode, which makes the Vivaldi Upsampler
immune to clock jitter from the computer / sound server. The Upsampler uses its own internal clock or
locks to the Master Clock connected to one of the
Word Clock
inputs. Feedback through the USB
cable to the computer controls the data delivery rate.
The
USB1
interface on a ‘B’ type connector (V) will accept PCM data at up to 24 bits / 384kS/s from a
Windows™ PC, Apple Mac™ PC or sound server equipped with a suitable USB2.0 interface. The
interface will also accept DSD/64 data packaged in DoP format.
