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Introduction
9
The digital surround processor provides an extremely
comprehensive range of digital signal processing options for
decoding both analogue and digital audio signals and
processing them for multi-channel reproduction. These are
referred to as DSP presets, and are designed to provide the best
results with a range of different types of music and film material.
In addition to selecting built-in DSP presets, the digital surround
processor allows you to create your own presets based on the
standard ones. For example, you may want to add more delay to
the rear speakers to create a more spacious sound. You can
store your modified preset with a name of your choice, and
recall it for use at a later date.
This section gives information about each of the built-in DSP
presets, and gives recommendations for the best preset to
choose for different types of material.
Multi-channel digital sources
Several alternative multi-channel digital formats are currently
available which encode up to eight different channels onto a
digital signal. Four alternatives are currently in use: Dolby Digital,
DTS, MPEG Surround, and MLP. However, the 568 has been
designed so that it can be upgraded by downloading a software
update, to cater for new formats as they are introduced.
Dolby Digital
Dolby Digital, previously called AC-3, is the preferred sound
format for DVD video, and is widely used on LaserDisc
soundtracks. It is also the audio standard for US digital
television.
DTS
DTS uses an audio compression technique to encode five
channels of audio onto a digital signal. The DTS format is used
to encode multi-channel film soundtracks on LaserDiscs and
DVD video discs.
DSP presets