miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 1

N-DAC8 8-CHANNEL AVB/ETHERNET DAC

User Manual

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 2

Revision history

Revision Description Date

1.0 First released version 28 October 2015

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 3

TABLE OF CONTENTS

Important Information ......................................................................................................................................... 4

System Requirements – Windows .................................................................................................................... 4

System Requirements – Mac OS X .................................................................................................................... 4

Disclaimer/Warning ......................................................................................................................................... 4

Warranty Terms ............................................................................................................................................... 4

FCC Class B Statement...................................................................................................................................... 4

CE Mark Statement .......................................................................................................................................... 5

Package Contents ............................................................................................................................................ 5

A Note on this Manual ..................................................................................................................................... 5

1 Product Overview .......................................................................................................................................... 6

1.1 Typical application ................................................................................................................................ 6

1.2 About AVB ............................................................................................................................................ 7

2 Hardware connectivity .................................................................................................................................. 8

2.1 Analog output ...................................................................................................................................... 8

2.2 DC Power ............................................................................................................................................. 8

2.2.1 Ethernet ....................................................................................................................................... 9

3 Installation and Configuration – Mac OS X ................................................................................................... 10

3.1 Installation ......................................................................................................................................... 10

3.2 Configuration ..................................................................................................................................... 10

4 Additional information ................................................................................................................................ 14

4.1 Specifications ..................................................................................................................................... 14

4.2 Obtaining support .............................................................................................................................. 14

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IMPORTANT INFORMATION

Please read the following information before use. In case of any questions, please contact miniDSP via the

support portal at minidsp.desk.com.

SYSTEM REQUIREMENTS – WINDOWS

Use of the N-DAC8 is currently not supported on Windows.

SYSTEM REQUIREMENTS – MAC OS X

Intel Core Duo processor or greater

512 megabytes (MB) of RAM or higher recommended

OS X 10.9 "Mavericks" or later

Ethernet network connection

DISCLAIMER/WARNING

miniDSP cannot be held responsible for any damage that may result from the improper use or incorrect

configuration of this product. Please read this manual carefully to ensure that you fully understand how to

operate and use this product, as incorrect use or use beyond the parameters and ways recommended in this

manual have the potential to cause damage to your audio system.

Please also note that many of the questions we receive at the technical support department are already

answered in this User Manual and in the online application notes on the miniDSP.com website. So please take

the time to carefully read this user manual and the online technical documentation. Thank you for your

understanding!

WARRANTY TERMS

miniDSP Ltd warrants this product to be free from defects in materials and workmanship for a period of one

year from the invoice date. Our warranty does not cover failure of the product due to incorrect connection or

installation, improper or undocumented use, unauthorized servicing, modification or alteration of the unit in any

way, or any usage outside of that recommended in this manual. If in doubt, contact miniDSP prior to use.

FCC CLASS B STATEMENT

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

This device may not cause harmful interference.

This device must accept any interference received, including interference that may cause undesired

operation.

Warning: This equipment has been tested and found to comply with the limits for a Class B digital device,

pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection. This

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equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance

with the instructions, may cause interference to radio communications. However, there is no guarantee that

interference will not occur in a particular installation. If this equipment does cause harmful interference to radio

or television reception, which can be determined by turning the equipment off and on, the user is encouraged to

try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

Notice: Shielded interface cable must be used in order to comply with emission limits.

Notice: Changes or modification not expressly approved by the party responsible for compliance could void the

user’s authority to operate the equipment.

CE MARK STATEMENT

The N-DAC8 has passed the test performed according to European Standard EN 55022 Class B.

PACKAGE CONTENTS

Your N-DAC8 package includes:

One N-DAC8 multichannel high-resolution D/A convertor

One universal 5 VDC power supply

One Ethernet cable

A NOTE ON THIS MANUAL

This User Manual is designed for reading in both print and on the computer. If printing the manual, please print

double-sided. The embedded page size is 8 ½” x 11”. Printing on A4 paper will result in a slightly reduced size.

For reading on the computer, we have included hyperlinked cross-references throughout the manual. In

addition, a table of contents is embedded in the PDF file. Displaying this table of contents will make navigation

much easier:

In Adobe Reader on Windows, click on the “bookmarks” icon at the left. The table of contents will appear on

the left and can be unfolded at each level by clicking on the “+” icons.

In Preview on the Mac, click on the View menu and select Table of Contents. The table of contents will

appear on the left and can be unfolded at each level by clicking on the triangle icons.

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1 PRODUCT OVERVIEW

Thank you for purchasing a miniDSP N-DAC8 multi-channel D/A convertor. The N-DAC8 supports 8 channels of

audio playback over Ethernet AVB (Audio Video Bridging) protocol, and is an ideal solution for:

Studios and professional sound installations with AVB support

Distributed and immersive audio

Advanced home networked audio

1.1 TYPICAL APPLICATION

The Ethernet input of the N-DAC8 connects to any AVB-enabled Ethernet switch. The outputs can be connected

directly to power amplification or to powered loudspeakers. Use of AVB allows for flexible distributed audio

applications in both home and studio settings.

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1.2 ABOUT AVB

AVB defines a group of network protocols for the distribution of time-synchronized and low-latency audio &

video streams over IEEE802 networks. By leveraging a combination of existing 802 network technologies along

with standards specifically designed for the purpose, AVB technology lays the groundwork for unparalleled

guaranteed media streaming over Ethernet networks. The overall concept of AVB is actually rather simple. In

brief, the three core protocols specify:

1. Timing and synchronization

2. Bandwidth allocation through the Stream Reservation Protocol (SRP)

3. Traffic shaping to ensure that low priority Ethernet traffic does not interfere with AVB traffic.

Engineered from the ground up for media streaming applications, AVB has a definitive edge over legacy Ethernet

technology in the sense that it allows bandwidth allocation and priority rules based on timing. Unlike similar

audio over IP (AOIP) technology, AVB will dynamically assign and defend bandwidth allocation for AVB

streaming, thanks to the Stream Reservation Protocol (SRP).

These are the key terms used for AVB streaming:

Audio Video Bridging (AVB)

General descriptive for a group of protocols providing audio/ video streaming, timing,

synchronization, Quality of service (QoS) , control and discovery.

AVB Endpoint

A device capable of transmitting and/ or receiving audio streams using the P1722/P1733

transport protocol.

Talker

An AVB endpoint transmitting audio to the network (source).

Listener

An AVB endpoint receiving audio from the network (sink/destination).

Talker/Listener

An AVB endpoint that is both transmitting and receiving.

Precision Time Protocol (PTP)

The protocol that allows devices on the network to get a notion of global time in order to

synchronize with each other. PTP components in each AVB module can act as a Grand Master

(providing clock) or as a slave (receiving clock). Once a grand master negotiates and is selected

as a sync source, all units will synchronize to it.

Stream ID

Unique 64-bit stream identifier used by AVB transport protocols to identify streams.

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2 HARDWARE CONNECTIVITY

2.1 ANALOG OUTPUT

Connect the analog outputs to power amplification, an A/V receiver, or powered loudspeakers.

Always be sure to turn off all equipment before connecting or disconnecting audio signal cables.

2.2 DC POWER

The supplied 5 VDC power supply includes a set of interchangeable power pins. Fit the correct pins for your

country. Connect the DC plug to the DC (5V) power socket.

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2.2.1 Ethernet

Connect an Ethernet cable from the N-DAC8 Ethernet port to a free port on an AVB-enabled router or switch,

such as the miniDSP AVB-SW. Note that for the network to be AVB-enabled, all devices between the audio

source and the N-DAC8 must be AVB-enabled. This diagram illustrates a typical scenario.

If an AVB-enabled local area network is not available, the N-DAC8 can be connected directly to the AVB-enabled

audio source.

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3 INSTALLATION AND CONFIGURATION – MAC OS X

Please note: the N-DAC8 is directly supported by Mac OS X 10.9 and later. miniDSP does not currently support

use of the N-DAC8 with Windows.

3.1 INSTALLATION Mac OS X (10.9 "Mavericks" or later only) has native support for AVB, so no driver installation is required.

Versions of OS X prior to 10.9 "Mavericks" do not have inbuilt AVB support. While it may be possible to use

third-party drivers, please note that miniDSP does not support operation of the N-DAC8 with earlier versions of

OS X.

3.2 CONFIGURATION

1. Open the program Audio MIDI Setup (in Applications->Utilities).

2. Drop down the Window menu and select Network Device Browser.

3. In the Network Device Browser window, you will see one or more AVB devices. miniDSP N-DAC8

identifies as "DSP4YOU AVB Dongle". Click the checkbox next to any that you wish to send audio to from

this computer. (Shown as the red circle in the below screenshot).

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4. Close the Network Device Browser Window. The selected AVB devices will appear as audio output

devices in the Audio Devices window. miniDSP N-DAC8 identifies as "DSP4YOU AVB Dongle". Select the

N-DAC8 to confirm its output properties:

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5. (Optional) Click on the Configure Speakers button and set the multichannel format to be sent to this

device. (Click Done to exit.)

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6. To send all system audio to the N-DAC8, open System Preferences -> Audio, and select the N-DAC8 as

the output sound device:

7. For audio applications that allow specific audio output devices to be set, go to the Preferences settings

on that application and select the N-DAC8 as the output device.

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4 ADDITIONAL INFORMATION

4.1 SPECIFICATIONS

Network port 1 x auto speed sensing 10/100 Mbps RJ45 port

Network protocols &

IEEE standards

IEEE 802.3i/u for 10/100BaseT

IEEE 802.1AS, 802.1Qat, 802.1Qav for Audio Video Bridging standards

IEEE 1722.1 for discovery and enumeration

Driver Mac OS X 10.9 or later: No driver required

Analog outputs 8 unbalanced (RCA) outputs

Output level: 2 Vrms

Dynamic range: 103 dB

THD: 0.006%

Output impedance: 560 Ohms

Audio sample rate /

Resolution

Input/output resolution: 24-bit integer

Sample rate: 48 kHz

Power supply 5 VDC single supply

Dimensions (H x W x D) 31 x 161 x 110 mm

4.2 OBTAINING SUPPORT

1. Check the forums on miniDSP.com to see if this issue has already been raised and a solution or solutions

provided.

2. Contact miniDSP via the support portal at minidsp.desk.com with:

a. The product information including OS version and version of driver installed (for Windows).

b. A clear explanation of the symptoms you are seeing.

c. A description of the troubleshooting steps you performed and the results obtained.