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Introduction
9
DSP presets
The digital surround processor provides an extremely
comprehensive range of options for decoding both analogue
and digital audio signals and processing them for multi-channel
reproduction.
The digital surround processor provides several digital signal
processing options, called DSP presets, and these 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
The 565 Digital Surround Processor supports the three
alternative multi-channel digital formats currently available,
which encode up to 8 different channels onto a digital signal:
Dolby Digital (AC-3), DTS, and MPEG Audio. It also supports
Meridian’s own MLP format.
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 a carefully designed 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.
In addition, a high data-rate version of DTS can be used to
compress five channels of CD-quality audio into the same space
as two channels of unencoded sound, allowing a DTS music CD
to provide over an hour of five-channel music, at a quality
indistinguishable from conventional CD.