Audio Setup - Arcam DV27A Handbook

AUDIO SETUP

Audio 3/7
Audio
Down-sample
Pro Logic
Audio Delay
This section allows you to configure the type of analogue and digital audio
outputs. In particular, the digital output type needs to be set correctly if
you are using an external audio decoder, receiver or D-A converter.
AUDIO
Two different types of digital output are supported: 'Bitstream' and
'Stereo PCM'.
Bitstream The Bitstream setting supports the following audio
standards:

2 channel PCM (on CDs or DVDs)

Dolby Digital

MPEG multi channel

DTS multi channel
Use the Bitstream setting if you have an external
decoder that supports Dolby Digital.
Stereo PCM When the "Stereo PCM" digital output is selected, all
audio material played is down-mixed to stereo and
output as stereo PCM. Use this setting if you have an
external D-A converter that supports only 2-channel
PCM.
Since the digital and analogue outputs are closely related, the analogue
audio output reflects the digital output type selected.
The options available are as follows:
Bitstream + The digital output is "Bitstream" (as described above).
6 Ch. The analogue audio will comprise up to six channels of
output, depending on the source material, the speaker
configuration (see the "Speaker Setup" section) and the
"Pro Logic" setting (see below).
Bitstream +
The digital output is "Bitstream" (as described above).
2 Ch.
The analogue audio will comprise a 2-channel stereo
down-mix of the source material.
PCM + 2 Ch. The digital output is "Stereo PCM" (as described above).
The analogue audio will comprise a 2-channel stereo
down-mix of the source material.
PRO LOGIC
This controls 'Pro Logic' processing of the material. Pro Logic decoding
creates a four-channel surround output from sources that are encoded
in Dolby Surround format. It is relevant only when two-channel source
material is being played.
Off No Pro Logic processing is performed.
On
Pro Logic processing is performed on all appropriate two-
channel material.
Auto Pro Logic processing is performed when the audio track on
the DVD is indicated as being Dolby Surround encoded.
Bitstream/2 Ch.
Max 48K
Off
Normal
Note the following points:
 If two-channel output is selected via the "Audio" item, no Pro
Logic decoding will ever be performed.
 If the player is configured to have only two speakers connected
to it (described in the next section), then no Pro Logic decoding
will be performed.
 MP3 and WMA files, together with DVD-audio discs and any
96kHz (or above) material, are not suitable for Pro Logic
decoding and will never be processed.
AUDIO DELAY
Because the progressive scan processing takes several pictures (frames)
to produce a higher quality output, the audio signal needs to be delayed
so that video and audio remain synchronized.
The audio delay needs to be set according to whether you are using
standard outputs, or the progressive output from your DV27A.
Normal Choose this setting if you are using one of the standard
video outputs.
Progressive
Choose this setting to watch video via the progressive video
output of the DV27A.
DOWN-SAMPLE
This needs to be set correctly if you are using an external audio
decoder, receiver or D-A converter.
Max 96K Choose this option if your external audio decoder
is able to process digital audio with a sample rate of
up to 96KHz, or if you are not using the digital audio
outputs.This is the maximum sample rate present on
DVD-video discs.
Max 48K
Choose this option if your external audio decoder is
unable to process digital audio with a sample rate of
up to 96KHz.
NOTE: This setting is relevant only to the output from
DVD-video discs.
9