Digital Bitstream Indicators; Usb Playback - Harman Kardon AVR 745 Owner's Manual

29510_AVR745_Engelsk 30/10/06
Operation
If you wish to disable the auto-polling feature,
you may do so by following the instructions
shown for the
IN/OUT SETUP
(Figure 2), as shown on page 23.
When the digital source is playing, the AVR will
automatically detect whether it is a multichannel
Dolby Digital or DTS source or a HDCD, MP3 or
conventional PCM signal, which is the standard
output from CD players.
Note that a digital input (e.g. coaxial) remains
associated with any analog input (e.g. DVD) as
soon as it is selected, thus the digital input need
not be re-selected each time the appropriate
input choice (e.g. DVD) is made.

Digital Bitstream Indicators

When a digital source is playing, the AVR senses
the type of bitstream data that is present. Using
this information, the correct surround mode will
automatically be selected. For example, DTS bit-
streams will cause the unit to switch to DTS
decoding, and Dolby Digital bitstreams will enable
Dolby Digital decoding. When the unit senses
PCM data, from CDs and LDs and some music
DVDs or certain tracks on normal DVDs, it will
allow the appropriate surround mode to be
selected manually. Since the range of available
surround modes depends on the type of digital
data that is present, the AVR uses a variety of
indicators to let you know what type of signal is
present. This will help you to understand the
choice of modes and the input channels recorded
on the disc.
When a digital source is playing, the AVR will
display a variety of messages to indicate the type
of bitstream received. These messages will
appear shortly after an input or surround mode is
changed, and will remain in the Main Infor-
mation Display ˜ for about five seconds
before the display returns to the normal surround
mode indication.
For Dolby Digital and DTS sources, a three digit
indication will appear, showing the number of
channels present in the data. An example of this
type of display is 3/2/.1.
The first number indicates how many discrete
front channel signals are present.
• A 3 tells you that separate front left, center
and front right signals are available. This will be
displayed for Dolby Digital 5.1 and DTS 5.1
programs.
• A 2 tells you that separate front left and right
signals are available, but there is no discrete
center channel signal. This will be displayed for
Dolby Digital bit streams that have stereo pro-
gram material.
• A 1 tells you that there is only a mono channel
available in the Dolby Digital bitstream.
48 OPERATION
9:32 Side 48
The middle number indicates how many discrete
surround channel signals are present.
menu
• A "3" tells you that separate, discrete left sur-
round, center surround and right surround sig-
nals are present. This is available only on discs
with DTS-ES digital audio.
• A 2 tells you that separate surround left and
right signals are available. This will be dis-
played for Dolby Digital 5.1 and DTS 5.1 pro-
grams.
• A 1 tells you that there is only a single, sur-
round encoded surround channel. This will
appear for Dolby Digital bit streams that have
matrix encoding.
• A 0 indicates that there is no surround channel
information. This will be displayed for two-
channel stereo programs.
The last number indicates if there is a discrete
Low Frequency Effects (LFE) channel. This is the
".1" in the common abbreviation of "5.1" sound
and it is a special channel that contains only bass
frequencies.
• A .1 tells you that an LFE channel is present.
This will be displayed for Dolby Digital 5.1 and
DTS 5.1 programs, as available.
• A 0 indicates that there is no LFE channel
information available. However, even when
there is no dedicated LFE channel, low fre-
quency sound will be present at the subwoofer
output when the speaker configuration is set to
show the presence of subwoofer.
• The information in the right side of the display
will tell you if the digital audio data contains a
special flag signal that will automatically acti-
vate the appropriate 6.1 or 7.1 mode. This will
be shown as EX-ON or EX-OFF for Dolby
Digital bitstreams and ES-ON or ES-OFF for
DTS bitstreams.
When Dolby Digital 3/2/.1 or DTS 3/2/.1 signals
are being played, the AVR will automatically
switch to the proper surround mode, and no
other processing may be selected. When a Dolby
Digital signal with a 3/1/0 or 2/0/0 signal is
detected you may select any of the Dolby sur-
round modes.
It is always a good idea to check the readout for
the channel data to make certain that it matches
the audio logo information shown on the back of
a DVD package. In some cases you will see indi-
cation for "2/0/0" even when the disc contains a
full 5.1, or 3/2/.1 signal. When this happens,
check the audio output settings for your DVD
player or the audio menu selections for the spe-
cific disc being played to make certain that the
player is sending the correct signal to the AVR.

USB Playback

The AVR 745 is among the very few A/V receivers
capable of direct connection to a computer for
audio playback. Once the AVR is connected,
audio streams and playback are possible through
your AVR, with all the power and performance of
the high-current amplifier, your own speakers,
and the enhanced multichannel playback made
possible through the use of Logic 7, Dolby Pro
Logic II/IIx or DTS Neo:6 processing.
The AVR 745's USB connectivity may be used
with PC-compatible computers running either
Microsoft ® Windows ® 2000 with Service Pack 4
or higher installed, or Windows XP ® or Windows
XP Media Center Edition with Service Pack 1 or
higher installed. Connect one of the available
USB jacks on your computer or a USB hub to the
USB Jack on the AVR using a cable with a
standard USB plug on one side and a USB "Mini
B" plug on the other side. You may use an
optional cable available at most electronics and
computer stores for this purpose, or you may use
the cable supplied for use with the TC 30 remote,
if it is not being used to program the remote.
In addition, you will need to have a media player
installed on the computer. The AVR 745 has been
tested for operation with Windows Media Player
Version 8.0 and above, but it is also compatible
with many other popular players such as iTunes
WinAmp ® and Real Player ® . In most cases, it is
best to always make certain that you have the
latest version of the player installed to ensure the
best compatibility.
When the connection between a computer and
the AVR is made for the first time, or if the USB
connection is plugged into a different USB jack
on a computer or hub that has not been
previously connected to the AVR, you will see a
series of pop-up messages from Windows to
indicate that the computer is configuring itself
for the new device. Since the AVR provides a
number of different functions, you may see the
"Found New Hardware" message up to four
times, one each for "A/V Receiver," "Compatible
Device," "Audio Receiver" and "Human Interface
Device." When all messages have appeared and
then cleared the screen, you are almost ready to
begin.
Before selecting the USB input, first make certain
that one of the media players listed above has
been opened on the computer. Then you may
select the USB input in any of the following
ways:
• To select USB as a source from the front panel,
press the Input Source Selector Button %
until appears as the input name in the
USB
Upper Display Line ˜ and in the semi-OSD
display, if available. The USB Input Source
Indicator ˆ will also light up on the front
panel.
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