Arcam fmj D33 Посібник користувача - Сторінка 7

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connecting sources

The D33 DAC has multiple digital audio, computer and iPod inputs so that you can connect all of your digital

audio sources, and switch between them using the remote control or front panel. A front panel LED illuminates to

indicate the selected input: green if a valid signal is detected, or red if there is no signal or an invalid signal.

digital audio connections (aeS/ebu, S/PdiF)

Connect each digital source using the appropriate cable.

If a source has multiple types of digital audio output,

select the best type according to the order of preference

below.

aES/EBU

AES/EBU connections are found on professional

audio equipment (the standard was developed by the

Audio Engineering Society and European Broadcasting

Union). Connect the source's AES/EBU output to the

D33 AES/EBU input using a digital audio XLr cable

with 110Ω impedance.

Coaxial S/PDiF

S/PDIF connections are the most common digital audio

connection. They are available in two types, coaxial

and optical. Coaxial is the best of the two types, as this

electrical connection provides the most direct signal

path. If your digital source provides both a coaxial and

an optical output, connect the coaxial connection using

a 75Ω impedance digital audio interconnect cable. Do

not use an analogue audio cable as performance may be

degraded.

Optical S/PDiF

Optical S/PDIF is technically inferior to coaxial S/

PDIF because the signal must be converted to pulses

of light for transmission then back to a voltage signal

afterwards. This process can degrade the signal.

However, optical connections provide electrical isolation

which can benefit the connection between certain types

of equipment, for example, televisions. Some digital

sources provide an optical output only.

uSb computer connection

Two Type-B USB sockets are provided for the USB

computer connection. It is important to choose

the connection most suitable for your system. The

switch must be set to the correct position for

uSb SElECT

the socket used.

Class i isolated USB

This socket is the best socket to use for most systems.

It provides galvanic electrical isolation between the

computer and the D33 DAC to eliminate any audio

interference caused by the computer power supply. This

input also does not require any special driver installation

as the required software is built-in to modern versions

of Microsoft® Windows® (Windows XP, Windows Vista®

and Windows 7), Mac OS® X and Linux®.

The Class I connection is limited to a maximum sample

rate of 96kHz. CD audio has a sample rate of 44.1kHz.

Most 'High resolution' audio files from specialist

download sites (at the time of writing) have a sample

rate of 96kHz so are compatible with this connection.

Start your computer and log on to the operating system

if necessary. Connect this socket to the computer using

a standard Type-A to Type-B USB cable. Wait for the

operating system to detect the D33 and install drivers

automatically. If any installation dialogue boxes pop

up, select automatic installation. Once the installation

process is finished, launch your media player software to

play music through the D33 DAC.

Class ii High Speed USB

This socket does not have galvanic electrical isolation

from the computer power supply. It also requires that a

special device driver, provided on CD, be installed on

the connected computer. The benefit of this connection

is that it is compatible with sample rates up to 192kHz.

192kHz audio material, although rare, provides greater

audio information than material sampled at the 96kHz

rate, however, audible sound quality benefits over 96kHz

are still debated between both audio enthusiasts and

professionals.

Insert the supplied driver CD and run the setup

programme on the disc in order to install the audio

driver for this socket. Follow the on-screen instructions.

uSb connection compatibility

The USB connection is designed for the connection of a

desktop or laptop computer running a standard desktop

operating system such as Microsoft Windows 7, Mac OS

X or Ubuntu® Linux. The connection is not designed to

accept the following:

USB hard drives

USB flash drives

Tablet computers (connect an Apple® iPad™ to the

iPod® connection using your Apple USB cable)

nAS drives with USB speaker compatibility may or may

not be compatible with the D33 DAC in Class I mode;

this depends wholly on the device's support for the USB

Audio standard. At the time of writing, popular nAS

drvies with USB speaker compatibility do not fully

implement the latest USB Audio standard and are not

compatible with the D33. This may change with future

nAS drive firmware revisions.

USB COnnECtiOn PrOBlEmS?

Ensure that the D33 DAC is connected to your

computer and installed before starting any media

player software. Please refer to the USB FAQ on

the Arcam website at

http://www.arcam.co.uk

solutions to common USB connection issues.

nOtE:

Home cinema and AV equipment digital outputs

may need to be re-configured to work with a stereo

DAC. A DVD player, TV set-top box or television

may by default output a surround sound 'bitstream'

signal (e.g. Dolby Digital) on the optical or coaxial

digital connector. This must be changed in the

source's setup menu. Set the source's S/PDIF output

to 'PCM Stereo' or equivalent (refer to the source

equipment manufacturer's handbook).

The D33 input LED will remain red if a bitstream

signal is received, as this cannot be decoded.

e-7

connecting an iPod®, iPhone® or iPad™

The Type-A USB connector labelled '

IpOD

exclusively for the connection of compatible Apple

devices. The D33 DAC is made for:

iPhone 4S

iPhone 4

iPod touch® (4th generation)

iPad 2

iPad™

Other Apple devices do not support digital audio output

so cannot be used.

Use an Apple Dock Connector to USB cable to connect

the

USB socket to your Apple device.

IpOD

When the

input is selected and a device connected,

IpOD

the

LED will flash green whilst the Apple device

IpOD

performs authentication. This will complete in a few

seconds when the LED will stop flashing and illuminate

steady green.

Sometimes, authentication can fail, due to mis-insertion

of the Apple connector or dirty contacts on the Apple

device. If this occurs, disconnect then re-connect the

Apple device.

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