Basic Setup With A Pc; A Word About Music Playing Software - DCS Vivaldi Upsampler User Manual

dCS Vivaldi Upsampler User Manual

Basic setup with a PC

• Connect one of the computer's USB ports to the
• Press the
Input
button repeatedly until
The Upsampler's USB interfaces operate in True Asynchronous USB mode. This allows the clock
inside the Upsampler to control the delivery of data bursts from the computer, avoiding the use of the
computer's inaccurate and jittery clock.
Analogue outputs
to Amplifier
Figure 4 – Using a Vivaldi Upsampler and DAC with a laptop

A word about Music Playing Software

There are countless programs that can play music on Windows and Apple Mac OSX PCs.
Unfortunately, not all of them present the data completely unprocessed to the USB ports. For
example, Windows Media Player re-samples all data to 24 bits, albeit at the original sample rate, while
iTunes rate converts data as necessary to the output sample rate set in the OSX Audio MIDI Set-up
panel.
With such a proliferation of playing software, and with updates being issued daily, it is impossible for
dCS to be fully up-to-date with the behaviour and performance of all programs. If you have questions
or problems, we would urge you to take them up with your software vendor. What we will say is that
different programs operate very differently and it is well worth finding out exactly how your particular
program processes the audio.
One particular problem concerns iTunes when running on Windows systems. The default output word
length is 16 bits, this must be changed to 24 bits for correct operation. To do this, click on
Control Panel > Quicktime. Click on the
Size Sound Out
field of the
Filename: Vivaldi Upsampler Manual v1_0x.docx
USB1
is displayed.
Audio
section.
Page 15
USB1
port on the Upsampler's rear panel.
tab of the Quicktime panel and select
Software Issue 1.0x
November 2013
Start
>
24 bit
in the
English version