DCS Rossini User manual

This product incorporates the following dCS proprietary technology:
Ring DAC™
Part No: DCS451659 V02
© Data Conversion Systems Ltd. 2015 - 2018
All rights reserved. No part of this publication may be reproduced, stored in or introduced into a retrieval system,
or transmitted in any form, or by any means (electronic, mechanical, photocopying, recording or otherwise)
without the prior written permission of dCSF1F. Any person who does any unauthorised act in relation to this
publication may be liable to criminal prosecution and civil claims for damages.
Information contained in this manual is subject to change without notice, and whilst it is checked for accuracy, no
liabilities can be accepted for errors.
1dCS is Data Conversion Systems Ltd. Company registered in England No. 2072115.
dCS Rossini
Upsampling Network DAC
User Manual
Software Release 2.0x
December 2018

dCS Rossini Upsampling Network DAC User Manual Software Issue 2.0x
December 2018
Rossini DAC Manual v2_0x Page 2 English version

dCS Rossini Upsampling Network DAC User Manual Software Issue 2.0x
December 2018
Rossini DAC Manual v2_0x Page 3 English version
Contents
Using the dCS Rossini DAC for the first time......................................................................................5
What’s in the box? 5
Positioning the unit 5
Important Safety Instructions 6
Condensation 6
Safety Notice 7
Made for iPhone® and iPad® 8
Step-by-Step Guide 9
Preliminaries 9
STEP 1 – Connecting the analogue outputs 10
Using a preamplifier 10
Using a power amplifier directly 10
Balanced Outputs 10
STEP 2 – UPnP Network Connection 11
Compatibility 11
Basic set-up 11
Playing music with AirPlay 17
Using the Rossini DAC with Spotify Connect 17
Using the Rossini DAC with Tidal 17
Using the Rossini DAC with Roon 17
Playing MQA files 18
STEP 3 – Using the DAC’s PCM Inputs 19
Connecting to a Dual AES Source 19
Connecting to a Single AES or SPDIF source 20
STEP 4 – Using the USB1 interface with a computer 21
Compatibility 21
Setting the USB Audio Class 21
Loading the Windows driver for USB Class 2 21
Basic setup with a PC 22
A word about Music Playing Software 22
Selecting the Rossini DAC as your Audio Output device 23
STEP 5 – Using the USB2 input 24
STEP 6 – Clocking 25
Using the Rossini Clock 25
Using the Rossini DAC in Master Mode with a Transport 26
Using the Rossini DAC and Clock with a Transport 27
Further suggestions 28
Renaming the digital inputs 28
Renaming your Rossini 29
Power Link 29
Front Panel............................................................................................................................................30
Display – Network Renderer 30
Display – DAC Mode 31
Remote Control Receiver 31
Control Modes 31
Power Button 32
Menu Button 32
Filter Button 32
Input button 32
Mute Button 32
Rotary Control 33
Rear Panel .............................................................................................................................................34
Analogue Outputs 34
AES Digital Inputs 34
SPDIF Digital Inputs 34
USB Interfaces 35
Word Clock Inputs and Output 35
Network Interface 36
IR Remote Receiver 36
RS232 interface 36
Mains inlet 36
Label 36

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The Menu...............................................................................................................................................37
Using the Menu 38
INFORMATION Menu 39
Unit Status 39
Version 39
Contact 39
Update 39
AUDIO SETTINGS Menu 40
Phase 40
Filter 40
DSD Filter 40
Channel Swap 41
Balance 41
UNIT SETTINGS Menu 42
Sync Mode 42
Mapper 42
Output Level 43
Dual AES 43
USB Class 43
Buffer 43
Upsampling 44
RS232 Mode 44
CONFIGURATION Menu 45
Settings Lock 45
Save Configuration 45
Restore Configuration 45
Reset Input Names 45
Factory Reset 45
DISPLAY SETTINGS Menu 46
Brightness 46
Display On/Off 46
Logo On/Off 46
GENERATOR Menu 46
Channel Check 46
Phase Check 46
Burn In 46
Specification .........................................................................................................................................47
Maintenance and Support....................................................................................................................49
Service and Maintenance 49
Replacing a Blown Mains Fuse 49
Cleaning the case 49
Limited Warranty 50
If you need more help 51
Software History 52
Software update 53
Index ......................................................................................................................................................54

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USING THE dCS ROSSINI DAC FOR THE FIRST TIME
Congratulations on purchasing your dCS Rossini DAC.
Before using your unit, please read this section and the Step by Step Guide. This will enable you to
set the unit up quickly and safely with your hi-fi system.
From time to time, dCS will release updated software that you can install yourself using the Check for
Updates feature in the Rossini App. Please check our web-site occasionally to see if new Rossini
software is available, or consult your dealer.
What’s in the box?
Check that the box contains the following items:
•dCS Rossini DAC
•Manual and Menu Guide
•Power cable
•Ethernet cable
•USB cable type A-B
•2 spare fuses
•Spotify™ flyer
Notify your dealer as soon as possible if anything is missing or damaged. We suggest that you retain
the original packaging for possible future use. If this is not possible, replacement packaging can be
ordered from dCS or our distributors. Details can be found on our web site at www.dcsltd.co.ukH.
The Rossini DAC is intended to be controlled by the Rossini App over an ethernet network.
A dCS Premium IR remote control is available as an optional extra.
Positioning the unit
For best sound quality, the units in the Rossini range are designed to be mounted on separate shelves
of a rack, although they may be stacked directly on top of each other if this is absolutely necessary.
Place each unit on a firm, vibration free base, allowing convenient connection to the other parts of
your system. To prevent overheating, we recommend that you leave some free space around the unit
to allow for ventilation.
You can use the feet to level the unit. With all feet screwed fully home, the unit will sit
level on a flat surface. If you need to do any levelling, you can unscrew any of the feet up
to 3 complete turns, to give up to 3mm (1/8”) of height adjustment.

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Important Safety Instructions
The following statements are required to comply with U.S. safety standard UL60065.
•Read these instructions.
•Keep these instructions.
•Heed all warnings.
•Follow all instructions.
•Do not use this apparatus near water.
•Clean only with dry cloth.
•Install in accordance with the manufacturer’s instructions.
•Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
•Do not defeat the safety purpose of the grounding-type plug. A grounding type plug has two blades
and a third grounding prong. The third prong is provided for your safety. If the provided plug does
not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
•Protect the power cord from being walked on or pinched particularly at plugs, convenience
receptacles, and the point where they exit from the apparatus.
•Only use attachments / accessories specified by the manufacturer.
•Unplug this apparatus during lightning storms or when unused for long periods of time.
•Refer all servicing to qualified service personnel. Servicing is required when the apparatus has
been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled
or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture,
does not operate normally, or has been dropped.
Condensation
If the DAC is cold and is moved into a warm room, condensation will form inside the unit. This
interferes with normal operation. Remove the DAC from its packaging and let it stand for 1-2 hours, to
allow it to reach room temperature and the condensation to evaporate.

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Safety Notice
In the event of the unit developing a fault, please contact your dealer in the first instance.
If you decide to remove safety covers for any reason, disconnect the power cable first. Note that
removing covers voids the warranty.
To maintain protection from electric shock, the unit MUST be connected to mains earth (ground) via
the power cable. Also, unearthed systems do not give the best sonic performance.
Protect the product from dripping or splashing liquids. Liquid-filled objects such as vases must not be
placed on the product.
This product is not suitable for operation at altitudes above 2000m.
This product is lead-free and complies with the RoHS directive.
Before connecting the power cable to the unit for the first time, please check that it has been set to the
correct operating voltage for your mains supply. The unit’s voltage setting is shown on the serial
number label. If this does not match your local supply voltage, DO NOT attempt to use the unit.
Contact your dealer to have the unit reset. Using the unit with the wrong mains setting for your local
supply may result in serious damage to the unit and will invalidate the warranty. Do not attempt to
reset the voltage yourself.
We do not recommend the use of mains regenerators. However, if you do wish to use a mains
regenerator with variable voltage and frequency, we recommend that you set the voltage to match
your local voltage and the frequency to either 50Hz or 60Hz ONLY.
!
Damage caused to your Rossini DAC by misuse of a mains regenerator or by a
malfunctioning mains regenerator is not covered by the warranty.
Disposal at end-of-life - the symbol indicates that this product should not be treated as
normal household waste. It should be recycled, so please take it to an approved collection
facility.

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Made for iPhone® and iPad®
The Rossini DAC is compatible with the iPhone and iPad models illustrated below.
Made for:
“Made for iPod” and “Made for iPhone” mean that an electronic
accessory has been designed to connect specifically to iPod or
iPhone respectively and has been certified by the developer to
meet Apple performance standards. Apple is not responsible for the
operation of this device or its compliance with safety and regulatory
standards.
iPad®, iPhone, iPod and iPod touch®are trademarks of Apple Inc.,
registered in the U.S. and other countries.

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Step-by-Step Guide
This section guides you through setting up the unit for basic operation.
Preliminaries
The Menu Guide sheet details the menu structure and describes the two most common set-ups.
For digital interfaces, use with cables designed for digital audio:
•for AES/EBU interfaces use 110Ωscreened, twisted pair cables fitted with one male XLR
connector and one female XLR connector.
•for Word Clock or SPDIF BNC interfaces, use 75Ωcoax cables fitted with BNC plugs.
Word Clock interfaces require a simple DC-coupled connection. The interfaces may
malfunction or not work at all if capacitor coupled cables or cables with built-in networks
are used.
•for SPDIF RCA interfaces, use 75Ωcoax cables fitted with RCA Phono plugs.
•for TOSLINK optical interfaces, use Toslink fibre-optic cables.
•for the Network interface, use an RJ45 Ethernet cable, such as that provided with the unit.
•for the USB1 interface, use a standard screened USB 2.0 cable fitted with one type ‘A’ connector
and one type ‘B’ connector. The internal screen must be connected at both ends.
For analogue outputs, use with screened cables of the correct type:
•for balanced outputs, use screened, twisted pair cables fitted with one male XLR connector and
one female XLR connector.
•for unbalanced outputs, use coax cables fitted with RCA Phono plugs.
Some “audiophile” cables have unusual grounding or screening arrangements, or do not
have the correct characteristic impedance. If you have difficulty using such cables but
the problems disappear when ordinary cables are substituted, please ask the cable
manufacturer or your dealer for support.
Connect the power cable supplied to the power inlet on the DAC’s rear panel, plug the other end into a
convenient power outlet.
!
Please do not use an excessively heavy or inflexible power cable as this may damage
the power inlet connector.
The cables supplied with the unit are “commercial grade”, because most owners will
have their own “audiophile grade” cables or will prefer to make their own cable choices.
Set the rocker switch near the mains inlet to the Iposition, press the Power button.
Wait about 10 seconds while the DAC configures itself. If the unit is likely to be set in an unfamiliar
state, you can run the Factory Reset routine by pressing the buttons in this sequence: Menu, ►, ►,
►, Menu, ◄, ◄, Menu. Wait a few seconds while the unit resets itself.

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STEP 1 – Connecting the analogue outputs
Choose one of the following two sections:
Using a preamplifier
•Set the preamplifier volume control to a low level.
•Connect either the balanced (XLR connectors) or unbalanced (RCA phono connectors) outputs on
the DAC’s rear panel to matching line level inputs on your preamplifier (probably labelled CD or
AUX).
•Turn the DAC’s rotary control clockwise to set the Volume to maximum (- 0.0dB on the display).
•Slowly increase the preamplifier volume until the music is at the right level.
•If the preamplifier volume setting for a comfortable listening level is too high or too low, you may
need to change the Output Level setting.
•Press the buttons in this sequence: Menu, ►, ►, Menu, ►, Menu.
Setting the Output Level to 6V can cause some preamplifiers to distort. For this reason,
we recommend the 2V setting if a preamplifier is used.
Using a power amplifier directly
•Set the DAC’s Volume to around -40.0dB as shown on the display.
•Connect either the balanced (XLR connectors) or unbalanced (RCA phono connectors) outputs on
the DAC’s rear panel to matching inputs on your power amplifier. Switch on the power amplifier.
•Turn the DAC’s rotary control slowly clockwise until the music is at the right level.
•If the Volume setting for a comfortable listening level is higher than –10.0 or lower than –30.0, try
changing the Output Level setting.
•Press the buttons in this sequence: Menu, ►, ►, Menu, ►, Menu.
Balanced Outputs
!
The most common fault reported when using our balanced outputs is hiss, unstable
levels and a thin sound on both channels. This is caused by connecting the DAC’s
balanced output stage to an unbalanced input on an XLR connector with pin 3 left
unconnected. This does not work correctly with a balanced and floating output stage –
you must connect pin 3 to pin 1 (ground) to complete the signal path.
Another possible cause of this fault (probably on one channel only) is a broken cable.
Figure 1 – Basic setup for the Rossini DAC
The Rossini DAC has independent balanced and unbalanced output stages, you can
connect them to different amplifiers if you wish.
Balanced or unbalanced
Analogue outputs to
pre- or power amplifier

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STEP 2 – UPnP Network Connection
UPnP (Universal Plug and Play) is a set of protocols designed to allow consumer devices to interact
over a network. The Rossini DAC complies with the UPnP AV protocol, enabling it to communicate
with other non-dCS devices, provided they also comply with this protocol.
A network streaming system is made up of three standard UPnP components: UPnP Control Point,
UPnP Media Renderer and UPnP Media Server. A system may consist of one or more of each of
these components. In such a system, all of the media (songs, tracks, videos etc) is stored on the
server. This storage device can be a NAS or a Computer. The control point (e.g. a tablet or smart
phone) requests the address of a particular item of media from the server (e.g. a NAS drive). It then
passes this address to the renderer (e.g. a Rossini DAC) to play. The renderer directly retrieves the
item from the specified address on the server, decodes and plays the media as it arrives over the
network from the server.
Enabling network streaming of audio using a Rossini DAC relies on the presence of standard network
infrastructure in your system. A description of the network will not be discussed in this manual but at a
minimum the following components are required for system setup: Router, Computer, Rossini DAC,
NAS, Wireless access point (WAP), Wireless control point.
Please note that Ethernet cables are required to connect the devices and the NAS must have UPnP
media server software (e.g. Twonky, Asset, MinimServer) installed. If the UPnP control point is having
problems seeing the UPnP media server or the UPnP media renderer, you might need to disable
IGMP snooping in the router or enable UPnP discovery mode in the router or the NAS drive.
The dCS Rossini App is a control point application that will allow users to view / select available
renderers, view / select available media servers and browse / select / playback music via the Rossini
DAC. The dCS Rossini App is currently available for iOS.
Compatibility
The Rossini Player and the App are compatible with:
•iPad 2 or later.
•iPhone 5 or later.
•iPod Touch 5th generation.
Rossini App version 1.4.9 has been tested with iOS 11.4.1
Basic set-up
•Connect the system as shown below.
Figure 2 – Using a Rossini DAC with a NAS
Router NAS
Analogue outputs

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•For iPad or iPhone/iPod, download the dCS Rossini app from the App Store and install it.
•Connect the DAC’s Network interface to the Ethernet network.
•Connect the control device (e.g. iPhone) to the network.
•Launch the dCS Rossini App.
•The system will search for Rossini Players / DACs. Tap Configure to change the Rossini’s
settings, get information about the unit or use the test features. Tap Preferences to optimise the
unit for your use. You can add Spotify or Tidal to your Favourites on the Preferences page.
•Tap the picture of the DAC to go to the
Home page.
•
Tap UPnP to select a NAS on the same
network. (Alternatively, tap USB/iPod to
select a flash drive connected to the USB2
port.)
•Tap on a server to select it.
•Select the browsing method (Artist, Album,
etc.).
The icon in the lower left corner indicates
the selected input (Network in this case).

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•Navigate down to the track list.
•
Choose either All Tracks to play the whole
album or Selected Tracks and then tap on
the tracks you want to play.
•Tap one of the action buttons:
Cancel the Queue and play now.
Add to the start of the Queue.
Add to the Queue after the current
track.
Add to the end of the Queue.
Add to a Playlist.
The DAC’s Network input is automatically selected when the track starts playing.
Tap the back icon if you want to return to the previous page.
Tap the Home icon if you want to return to the Home page.
Tap the Network icon at the bottom of the screen to see the track that is currently playing.

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•Current track:
Shuffle tracks.
Repeat track.
Change phase.
Adjust volume.
•Set the volume slider as required, then tap the
white xto close the volume panel.
Tap here to go to the PlayQueue page.
Tap Home and then Playlists to go to the Playlists page.

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Tap on a list or the Play Queue to open it.
To delete a Playlist, swipe it to the left and tap
Delete.
Select a track and tap the Play icon to start playing it.
Tap here to save the Play Queue as a new Playlist, type a name and tap OK.
Tap this icon to start editing the open Play Queue or a Playlist.
To change the track order, drag tracks to the new position.
To delete tracks from a list, select them and then tap this icon.
When you have finished editing the list, tap the highlighted Edit icon again to de-select it.

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While browsing albums, artists or tracks, you can
search for some text in the list.
Tap on the Search icon – the keyboard will
appear.
Type the text you want to search for (or just part
of it).
If you have a large music library, the search may
take some time. Please be patient and take care
not to type a letter twice.
When the matching entries are displayed, drag
downwards in the list to close the keyboard.
Select the track you want and either play it or add
it to a playlist.
The current track screen of the iPad app in landscape mode displays the album art / metadata,
playback control and the PlayQueue.

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Playing music with AirPlay
When the DAC is connected to a network, music can be streamed from an Apple device via AirPlay to
the DAC. When AirPlay is active, the DAC’s Network input is automatically selected.
!
The lower Output Level settings are intended to prevent accidents when driving the
amplifiers directly and AirPlay is in use, as the volume set by the sending device can be
very high.
Using the Rossini DAC with Spotify Connect
Spotify lets you listen to millions of songs – the artists you love, the
latest hits and discoveries just for you.
If you are a Spotify user, you can control the DAC using your Spotify App.
1. Connect the DAC to the same Wi-Fi network as your phone, tablet or PC running the Spotify app.
2. Open the Spotify app and play any song.
3. Tap the song image at the bottom of the screen.
4. Tap the Connect icon.
5. Pick the Rossini DAC from the list.
For further information on how to set up and use Spotify Connect, please visit
www.spotify.com/connect
Licenses
The Spotify Software is subject to third-party licenses found here:
www.spotify.com/connect/third-party-licenses.
Using the Rossini DAC with Tidal
If you have a Tidal account, make sure you have checked Tidal in the Preferences >
Favourite Inputs page. Go to the Home page and tap the Tidal icon to access music
over the internet through Tidal.
To create and store Tidal playlists, please use the Tidal app directly.
www.tidal.com
Using the Rossini DAC with Roon
The Rossini DAC is Roon Ready. If you have a Roon account, you need to install Roon
server on your NAS drive or in a networked PC. You can then use Roon remote to
control playback. Roon requires a fairly powerful processor, so please check the Roon
website when choosing a NAS drive.
https://roonlabs.com/

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Playing MQA files
MQA (Master Quality Authenticated) MQA is an award-winning British technology
that delivers the sound of the original master recording. The master MQA file is fully
authenticated and is small enough to stream or download.
Visit www.mqa.co.uk for more information.
The MQA logo is a trademark of MQA Limited and is used under licence.
Rossini DAC v1.1 onwards features a full MQA decoder.
MQA files streamed bit-perfect via the Network (for example from Tidal Masters) or
USB2 interfaces will be unfolded and rendered to the original sample rate. The standard
MQA icon will appear on the display, together with the decoded sample rate.
This logo is displayed when an MQA studio file is being played.
MQA data that has been unfolded by another device to 24/88.2 or 24/96 and is presented bit-perfect to
the USB1, AES or SPDIF interfaces will also be rendered to the original sample rate.
When performing MQA playback, the type of MQA stream is indicated on the control app’s Now
Playing screen:
This green-dot icon appears when standard MQA files are being played.
This blue-dot icon appears when MQA studio files are being played.
MQA decoding is not possible if the original MQA data has been changed.
If the MQA logo does not appear when expected, please disable any DSP features in the
streaming program.

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STEP 3 – Using the DAC’s PCM Inputs
The DAC has 5 standard PCM inputs, which may be used with a wide variety of sources.
Switch on the source equipment. If appropriate, load a disk / tape / file and set the machine in PLAY
mode to ensure it is generating a digital audio data stream.
Choose one or both of the following two sections:
Connecting to a Dual AES Source
•Check that your source equipment is capable of Dual AES operation and is set up correctly. This
will probably a dCS SACD Transport, a dCS Upsampler or a sound server.
Press Menu, ►, ►, ►, Menu, ►to select the Unit Settings > Dual AES menu page and
use the Menu button to ensure it is set to Auto.
•Connect the AES1 (or AES A) output on your source equipment to the AES1 input on the DAC’s
rear panel and the AES2 (or AES B) output to the AES2 input, using two XLR cables. Ensure the
cables are not swapped.
Figure 3 – Using the Rossini DAC with the Vivaldi CD/SACD Transport
•Use the Input button to select the AES1 input.
If this icon is not displayed, open the Menu and select Unit Settings > Sync Mode >
Audio Sync.
The DAC will lock to the source and automatically select AES1+2, displaying 24/352.8 for example, if
the source is generating that format.
Analogue outputs

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Connecting to a Single AES or SPDIF source
Most digital audio source equipment (such as CD transports, DVD players) is fitted with a single wire
digital output, usually on an RCA phono connector. Satellite receivers often have a Toslink optical
output.
•Connect your source equipment to the matching input on the DAC’s rear panel using a suitable
cable.
•Press the Input button repeatedly until your chosen input is displayed. This will be either AES1,
AES2, SPDIF1 (RCA), SPDIF2 (BNC) or TOS (Toslink).
If this icon is not displayed, open the Menu and select Unit Settings > Sync Mode >
Audio Sync.
The DAC will lock to the source, displaying 16/44.1 for example, if the source is a CD player.
If the inputs have been renamed, the standard names will not be displayed.
Why does the DAC display 0 bits? Is it faulty?
No, the DAC is working correctly. When the source equipment is connected but is not
playing, there is no data – just digital silence. The DAC correctly reports zero active data
bits until the source starts playing, then it detects the number of active bits and updates
the display. 0 bits may be displayed briefly between tracks also.
You can select the digital inputs from the app by going to the Home page and selecting
Digital.