I If your computer or sound card’s digital output is not capable
of direct connection to the AVR21EN, you may use an optional,
external transcoder to convert the USB output of a computer
to a format compatible with the AVR.
I Due to the wide variation in MP3 formats and encoding speeds,
it is possible that the AVR21EN may not be compatible with all
MP3 input signals. Some may produce unacceptable results or
may not be decoded. This is not a fault of either the computer
or the AVR21EN, but rather is a by-product of the unpredictable
nature of MP3 playback.
I Even when your computer does not have a digital output that
is compatible with the AVR21EN, you may connect the analog
audio output available on virtually all computers to one of the
AVR’s analog audio inputs, using an optional adapter cable that
converts the stereo mini plug commonly used for computer
audio connections to the left/right RCA jacks used on the AVR.
Connecting your computer to the AVR will enable you to take
advantage of the high-quality audio reproduction possible with
a home theater system, as well as enable the use of surround
processing modes such as Logic 7, to greatly enhance downloaded
or streaming audio playback.
IMPORTANT NOTES ON DIGITAL PLAYBACK:
I When the digital playback source is stopped or in a pause, fast
forward or search mode, digital audio data will momentarily
stop, and the channel position letters inside the AVR
Speaker/Channel Input Indicators will flash and an
UNLOCK message may appear. This is normal and does
not indicate a problem with either the AVR21EN or the source
machine. The AVR21EN will return to digital playback as soon
as the data is available.
I Some source devices, particularly cable set-top boxes, will switch
back and forth between digital and analog audio outputs,
depending on the channel being watched. To avoid losing
sound with this type of product, it is recommended that you
connect both the digital and analog audio outputs of the source
to the AVR21EN, with the digital audio input set as the default,
following the steps described in
AVR21EN Configuration/
Source Audio Input.
The AVR will monitor the digital data
stream and when it is interrupted the sound will mute briefly
and possibly display an
UNLOCK message while it switches to
the analog audio input. This switching is not a fault of either
the AVR or the cable box, as it is caused by the use of different
audio technologies on different channels by the cable company
or program supplier.
I Although the AVR21EN will decode virtually all current DVD
movies, CDs and HDTV sources, it may not be compatible with
future digital sources.
I When a digital source is playing, you may not be able to select
some of the analog surround modes such as Dolby Pro Logic II,
Dolby Pro Logic IIx, Hall, Theater or Logic 7.
I When a Dolby Digital or DTS source is playing, it is not possible
to make an analog recording using the
VR and AUX Audio
Outputs
. However, the digital signals will be passed through
to the
Digital Audio Outputs D. NOTE: The digital signals
will also be passed through to the
Coaxial 3 Digital In/Out F
if it has been configured as an output.
132
System Operation
The letters used by the Speaker/Channel Input Indicators
also flash to indicate when a bitstream has been interrupted. This
will happen when a digital input source is selected before the
playback starts, or when a digital source such as a DVD is paused.
The flashing indicators, along with the
UNLOCK message in the
AVR
Lower Display Line , remind you that the playback has
stopped due to the absence of a digital signal and not through
any fault of the AVR21EN. This is normal, and digital playback will
resume once the playback is started again.
Night Mode
A special feature of Dolby Digital is the Night mode, which enables
specially encoded Dolby Digital input sources to be played back
with full digital intelligibility, while reducing the minimum peak
level by 1/4, to 1/3. This prevents abruptly loud transitions from
disturbing others, without reducing the impact of the digital
source. The Night Mode is available only when Dolby Digital
signals with special data are being played.
The Night mode may be engaged when a Dolby Digital DVD is
playing, by pressing the
Night Mode Button on the remote.
Next, press the
⁄
/
¤
Navigation Button F to select either the
middle range or full compression versions of the Night mode. To
turn the Night mode off, press the
⁄
/
¤
Navigation Button F
until the message in the lower third of the video display and in
the AVR
Lower Display Line reads NIGHT MODE OFF.
The Night mode may also be selected to always be on at either
level of compression, using the options in the SOURCES 1
SETUP menu. See
Audio Mode/Dolby for information on using
the menus to set this option.
MP3 Audio Playback
The AVR21EN is one of the few receivers equipped for onboard
decoding for the MP3 audio format used by computers and
portable audio devices. By offering MP3 decoding, the AVR21EN
is able to deliver precise conversion of the digital signals to an
analog output, along with the benefits of listening to the MP3
audio through the AVR21EN’s high-power amplifier and the speakers
from your surround system, rather than the smaller speakers and
low-powered amplifiers typically used with computers.
To take advantage of the AVR21EN’s MP3 capabilities, simply
connect the S/P-DIF output of a computer’s sound card or the
S/P-DIF output of a portable digital audio device to either the rear
panel
Digital Inputs or the front-panel Digital Inputs CF.
When the digital signal is available, the AVR
Lower Display Line
will indicate that an MP3 bitstream is present, and the audio will
begin playing.
NOTES:
I The AVR21EN is only capable of playing signals in the MP3
(MPEG 1/Layer 3) format. It is not compatible with other
computer audio codecs.
I The digital audio input signal may be either optical or coaxial,
but the signal must be in the S/P-DIF format. Direct connection
of USB or serial data outputs is not possible, even though the
signals are in the MP3 format. If you have any questions about
the data output format from your computer or a sound card,
check with the device’s owner’s manual.
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