Denon AVR-2805 Operating Instructions Manual page 57

DTS 96/24
The sampling frequency, number of bits and number of channels used for recording of music, etc., in studios has
been increasing in recent years, and there are a growing number of high quality signal sources, including 96
kHz/24 bit 5.1-channel sources.
For example, there are high picture/sound quality DVD video sources with 96 kHz/24 bit stereo PCM audio tracks.
However, because the data rate for these audio tracks is extremely high, there are limits to recording them on
two channels only, and since the quality of the pictures must be restricted it is common to only include still
pictures.
In addition, 96 kHz/24 bit 5.1-channel surround is possible with DVD audio sources, but DVD audio players are
required to play them with this high quality.
DTS 96/24 is a multi-channel digital signal format developed by Digital Theater Systems Inc. in order to deal with
this situation.
Conventional surround formats used sampling frequencies of 48 or 44.1 kHz, so 20 kHz was about the maximum
playback signal frequency. With DTS 96/24, the sampling frequency is increased to 96 or 88.2 kHz to achieve a
wide frequency range of over 40 kHz.
In addition, DTS 96/24 has a resolution of 24 bits, resulting in the same frequency band and dynamic range as 96
kHz/24 bit PCM.
As with conventional DTS Surround, DTS 96/24 is compatible with a maximum of 5.1 channels, so sources
recorded using DTS 96/24 can be played in high sampling frequency, multiple channel audio with such normal
media as DVD videos and CDs.
Thus, with DTS 96/24, the same 96 kHz/24 bit multi-channel surround sound as with DVD-Audio can be achieved
while viewing DVD-Video images on a conventional DVD-Video player (
compatible CDs, 88.2 kHz/24 bit multi-channel surround can be achieved using normal CD/LD players (
Even with the high quality multi-channel signals, the recording time is the same as with conventional DTS
surround sources.
What's more, DTS 96/24 is fully compatible with the conventional DTS surround format, so DTS 96/24 signal
sources can be played with a sampling frequency of 48 kHz or 44.1 kHz on conventional DTS or DTS-ES surround
decoders ( 2).
1 A DVD player with DTS digital output capabilities (for CD/LD players, a player with digital outputs for
conventional DTS CDs/LDs) and a disc recorded in DTS 96/24 are required.
2 The resolution is 24 or 20 bits, depending on the decoder.
AL24 Processing
2 Pure Direct Mode/AL24 Processing
The AVR-2805 is equipped with a pure direct mode allowing the effects of the video and digital circuitry to
be shut down when playing CDs or records to achieve the ideal environment for analog playback, resulting
in extremely high quality music playback. It is also equipped with AL24 processing which compensates the
input digital data to produce the near analog waveforms which would be in a nature with 24 bits quality. AL24
processing operates when PCM data such as CD is inputted.
System setup items and default values (set upon shipment from the factory)
1. Auto Setup/Room EQ
1
Auto Setup
Manual EQ
2
Setup
Room EQ
3
Setup
Direct Mode
4
Setup
Mic Input
5
Select
1). Furthermore, with DTS 96/24
2. Speaker Setup
1).
Speaker
1
Configuration
2
Delay Time
Channel
3
Level
Crossover
4
Frequency
Subwoofer
5
Mode
Auto Setup/Room EQ
Set this to switch the surround
Power Amp
back channel's power amplifier
Assignment
for use for zone2.
This parameter is for optimizing the Room EQ with
which the audio signals are produced from the
speakers.
Set the Room EQ setting with All or Assign for
each surround mode.
Set the ON/OFF setting of Room EQ, in the case of
the surround mode is in Direct or Pure Direct.
Set this to switch the Mic Input jack for use for Mic
or V.Aux L-channel input jack.
Speaker Setup
Input the combination of speakers in your
Front Sp.
system and their corresponding sizes (SMALL for
regular speakers, LARGE for full-size, full-range) to
automatically set the composition of the signals
output from the speakers and the frequency
Large
response.
This parameter is for optimizing the timing with
Front L & R
which the audio signals are produced from the
speakers and subwoofer according to the listening
3.6 m (12 ft)
position.
This adjusts the volume of the signals output from
Front L Front R Center
the speakers and subwoofer for the different
channels in order to obtain optimum effects.
0 dB 0 dB
Set the frequency (Hz) below which the bass so of
the various speaker is to be output from the
subwoofer.
This selects the subwoofer speaker for playing
deep bass signals.
ENGLISH
Default settings
SURROUND BACK
All Channel and Frequency=0 dB
All
OFF
Mic
Default settings
Surround Back
Center Sp. Subwoofer Surround Sp.
Sp.
Small Yes Small Small / 2spkrs
Center Subwoofer Surround L & R SBL & SBR
3.6 m (12 ft) 3.6 m (12 ft) 3.0 m (10 ft) 3.0 m (10 ft)
Surround Surround Surround Surround
Subwoofer
L R Back L Back R
0 dB 0 dB 0 dB 0 dB 0 dB 0 dB
80Hz
LFE
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