dCS Vivaldi DAC
User Manual
Software Issue 1.0x
August 2012
Filename: Vivaldi DAC Manual v1_0x.docx
Page 10
English
version
STEP 2 – Setting up the USB source
If you do not want to use a USB source, go to STEP 3.
Connecting the USB interface
The USB interface can be connected to Windows™ 7 or Windows™ Vista (SP2 or later), Windows™
XP (SP3 or later) PC, Mac™ OSX (10.5.4 or later) systems or a sound server, running software to
generate PCM data. The interface will work with Linux-based servers and computers fitted with USB
2.0 interfaces that natively support USB Audio Class 1 or Class 2 operation.
One of the USB Audio classes must be set during system set-up. The DAC is shipped set to USB
Audio Class 2.
USB Audio Class 1:
The interface operates without a special driver at up to 96kS/s.
To select Class 1, open the menu, navigate to the
Settings > USB Class
menu page. The
button sequence is:
Menu,
►
, Menu,
◄
,
◄
,
◄
,
◄
,
and then use the
Menu
button to
select the Class 1 icon. Wait 10 seconds while the Class 1 code is loaded.
USB Audio Class 2:
The interface operates at up to 192kS/s (including DSD over PCM).
For Mac OSX, version 10.6.3 or later is required.
For Windows 7 or Vista or XP, the driver files on the
dCS
USB Class 2 Driver disc supplied
must be installed onto the computer before use (see page
To select Class 2, open the menu, navigate to the
Settings > USB Class
menu page. The
button sequence is:
Menu,
►
, Menu,
◄
,
◄
,
◄
,
◄
,
and then use the
Menu
button to
select the Class 2 icon. Wait 10 seconds while the Class 2 code is loaded.
Figure 2 – Connecting the USB interface.
•
Connect one of the computer’s USB ports to the
USB
port on the DAC’s rear panel.
•
Press
the
Input
button repeatedly until
USB
is displayed. If the source is transmitting PCM data,
the DAC will lock to the source and the sample rate will be displayed.
The DAC’s USB interface operates in asynchronous mode. This allows the clock inside the DAC to
control the delivery of data from the computer, avoiding the use of the computer’s inaccurate and
jittery clock.
