Arcam DV27A manual Audio Setup, PRO Logic, Audio Delay, Down-Sample

AUDIO SETUP

	Audio 3/7
Audio	Bitstream/2 Ch.
Down-sample	Max 48K
Pro Logic	Off
Audio Delay	Normal

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.

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.	English
	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.

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