DIGITAL AUDIO CONNECTIONS
16
DIGITAL AUDIO CONNECTIONS
Optical Digital Audio Connection Notes
• 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 connector.
Audio Output From the Unit’s Optical/
Coaxial Digital Audio Output Connector
Disc:
Sound recording
Optical/coaxial digital
format:
audio output:
DVD
Dolby Digital
Dolby Digital bitstream
(2-5.1ch) or PCM
(2ch, 48kHz, 16-bit)
††
Linear PCM
Linear PCM (2ch)
(48/96kHz,
(48/96kHz,
16/20/24-bit)
16/20/24-bit)
DTS
Bitstream or no
output
††
CD
Linear PCM
Linear PCM
(44.1kHz sampling)
††
Digital format must be selected as “Original” or
“PCM” in Digital Output menu (see “Digital Output”
section on page 18).
For Your Reference:
• Dolby Digital is a digital sound compression
technique developed by the Dolby Laboratories
Licensing Corporation. Supporting 5.1-channel
surround sound, as well as stereo (2-channel)
sound, this technique 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 44.1kHz/16-bit,
DVDs are recorded in 48kHz/16-bit up to 96kHz/
24-bit.
• If you have a Dolby Pro Logic Surround decoder
connected to the DVD 25’s analog audio out con-
nectors, 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-
channel 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 96kHz sampling rate. The 96kHz
indicator will light in the display. However, some
96kHz DVDs may include copy protection codes
that do not permit digital output. For full 96kHz
fidelity from these discs, use the analog outputs of
the DVD 25. If your surround processor converter
does not support 96kHz PCM audio, you must use
the DVD 25 analog outputs for full 96kHz fidelity
with these discs.
• When connecting an amplifier (with an optical/
coaxial digital input) that does not contain a
Dolby Digital or DTS decoder, be sure to select
PCM as the initial setting in the Digital Output menu
(see page 18). Otherwise, any attempt to play
DVDs may cause such a high level of noise
that it may be harmful to your ears and damage
your speakers.
• CDs can be played as they would normally be played.
NOTE:
Some first-generation DTS decoders that do
not support DVD-DTS interface may not work properly
with the DVD/CD player.
Dolby Digital and DTS
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 13) and if the disc was
recorded in the Dolby Digital or DTS format.
