dCS
Vivaldi Upsampler User Manual
Software Issue 1.2x
December 2015
Vivaldi Upsampler Manual v1_2x
Page 20
English version
STEP 7 – Setting the Sync Mode for Computer Audio sources
Using the DAC in Universal Master Mode
You can improve the quality of playback from the Upsampler’s USB and Network interfaces by locking
the Upsampler to the DAC’s clock. This does not work well in standard Master Mode as the sample
rate may change between 44.1k-related rates and 48k-related rates. To solve this problem, the Vivaldi
DAC with software v1.10 (or later) has a Universal Master Mode which produces a 38.4kHz word clock
from which either base rate can be derived easily. Vivaldi Upsampler v1.10 (or later) can lock to this
frequency.
•
Add a connection from the DAC’s
Word Clock Out
put to the Upsampler’s
Word Clock In1
as
shown below. A PC is shown connecting to
USB1
, but the data source can be connected to
USB2
or the
Network
interface instead.
Figure 6 – Using a Vivaldi Upsampler and DAC In Universal Master Mode
•
Select the Upsampler input you are using.
•
Select the DAC’s
AES3+4
input.
Open the DAC’s Menu and select
Settings > Sync Mode > Universal Master Mode
.
Open the Upsampler’s Menu and select
Settings > Sync Mode > Word Clock 1
.
The Upsampler will lock to the DAC’s clock and will stay locked at any sample rate.
Analogue
outputs
to Amplifier
