DVD 25 (serv.man11) - Harman Kardon Audio User Guide / Operation Manual. Page 14

14 DIGITAL AUDIO CONNECTIONS

■ Remove the dust protection cap from the

optical digital audio output and connect the
cable firmly so that the configurations of both
the cable and the connector match.

■ Keep the dust protection cap and always 

reattach the cap when not using the connec-
tor.

* Digital Format must be selected as “ORIGI-

NAL“ or ”PCM” in Audio Set-Up Menu 
(see page 18).

■ Dolby Digital (AC-3) is a digital sound com-

pression technique developed by the Dolby
Laboratories Licensing Corporation,
supporting 5.1-channel surround sound, as
well as stereo (2-channel) sound, this tech-
nique enables a large quantity of sound data
to be efficiently recorded on a disc.

■ Linear PCM is a signal recording format used

in CDs. While CDs are recorded in 
44.1 kHz/16 bit, DVDs are recorded in 
48 kHz/16 bit up to 96 kHz /24 bit.

■ If you have a Dolby Pro Logic Surround

decoder connected to the DVD 25’s analog
AUDIO OUT connectors, thanks to the
”Downmix” function of the DVD 25 you will
obtain the full benefit of Pro Logic from the
same DVD movies that provide full 5.1-chan-
nel Dolby Digital soundtracks, as well as from
titles encoded with Dolby Surround.

■ The DVD 25 is designed to digitally output

96kHz-PCM audio with a 96 kHz sampling
rate. The 96 kHz indicator will light in the dis-
play. However, some 96 kHz DVD's may
include copy protection codes that do not
permit digital output. For full 96 kHz fidelity
from these discs, use the analog outputs of
the DVD 25.

IMPORTANT: If your surround processor/D/A
converter does not support 96 kHz PCM audio,
you must use the DVD 25 analog outputs for full
96 kHz fidelity with these discs.

■ When connecting an amplifier (with an opti-

cal/coaxial digital input ) which does not con-
tain a Dolby Digital (AC-3) or DTS decoder, be
sure to select ”PCM” as initial setting in the
”Digital Format” menu (see also page 18).
Otherwise, any attempt to play DVD may
cause such a high level of noise that it may
be harmful to your ears and damage your
speakers.

■ CD´s can be played as they would normally be

played.

Note:
■ Some first generation DTS decoders which do

not support DVD-DTS interface may not work
properly with the DVD/CD player.

Both Dolby Digital and DTS are audio formats
used to record 5.1-channel audio signals onto
the digital track of film. Both of these formats
provide six separate channels: left, right, center,
left rear, right rear, and common subwoofer.

Remember, that Dolby Digital or DTS will only
play 5.1-channel sound if you’ve connected the
optical or coaxial output of the DVD 25 to a DTS
or Dolby Digital receiver or decoder (see page
11) and if the disc was recorded in the Dolby
Digital or DTS format.

Dolby Digital is a trademark of Dolby Laboratories
Licensing Corporation.
Manufactured under license from Dolby
Laboratories. ”Dolby” and the double-D symbol
are trademarks of Dolby Laboratories.
Confidential Unpublished Works.1992-1997
Dolby Laboratories, Inc. All rights reserved.
DTS is a registered trademark of Digital Theater
Systems.

Disc:

DVD

CD

Sound recording
format:

Dolby Digital 
(AC-3)

Linear PCM
(48/96 kHz
16/20/24bit)

DTS 

Linear PCM

Optical/Coaxial digital
audio output 

Dolby Digital bitstream
(2-5.1 ch) or PCM 
(2 ch, 48 KHz/16bit)*

Linear PCM (2 ch) 
(48/96 kHz
16/20/24bit)

Bitstream or no 
output *

Linear PCM (44.1 kHz
sampling)