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The replacement for the original ProLogic, Pro Logic II is a technology where 5
channels (Front Left, Front Right, Centre, Surround Left, Surround Right) are
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II material can be played back by normal Stereo equipment (as Stereo) or
decoded into 5 channel surround-sound.
Dolby Pro Logic II is compatible with the earlier 4 channel (Left, Centre,
Right and mono Surround) Dolby Pro Logic system (which was the decoding
counterpart to Dolby Surround encoding) as used widely on Video tapes, TV
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Note: Pro Logic does not include a Low Frequency Effects channel for the
Subwoofer, but the 351R can create a Subwoofer output (for 5.1) via Bass
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'Operating instructions' part of this manual.
A DTS technology which is able to recreate 5 or 6 channels (Left Front, Right
Front, Centre, Left Surround, Right Surround plus optional Surround Back
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material. DTS Neo:6 material can be played back by normal Stereo equipment
(as Stereo) or decoded into 5.1 as on the 351R by sending the Surround Back
decode to the both the Surround Back Left and Right speakers.
Note: Neo:6 does not include a Low Frequency Effects channel for
the Subwoofer, but the 351R can create a Subwoofer output via Bass
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'Operating instructions' part of this manual.
A DTS technology that provides 5.1 channels of 96kHz / 24bit audio (along
with video if required) on DVD-Video and DVD-Audio (video zone) discs (when
suitably encoded in DTS 96/24). DVD players which allow 'DTS digital out'
pass the DTS 96/24 bitstream over S/P DIF or HDMI for decoding in the
351R.
DSP modes
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has no encoding at all. The surround sound effect is achieved by Digital Signal
Processing of the Analogue or Digital stereo source used. Five modes are
possible: Movie, Music, Room, Theatre and Hall.
Stereo/ Sub
Only the Front Left and Front Right speakers (and subwoofer if selected) have
output in this mode. If an analogue source is selected it will be converted
to digital via 24 bit A/D converters to allow digital domain sub creation and
bass/treble controls.
If a digital source is selected the 351R will be processing either LPCM stereo
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of DD or DTS material (from the digital output of a DVD player for instance).
Other modes
Analogue Stereo Direct
Selects the analogue inputs for the current source directly with no A/D
conversion, DSP processing, Bass/Treble or subwoofer channel active.
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Multi Channel PCM
Some playback devices (in particular Blu-ray players) are able to decode
some of the above formats themselves internally and then output the
decoded audio as Multi Channel PCM to the 351R. In addition Blu-ray disks
can support native unencoded Multi Channel PCM soundtracks on the disc
itself. In either case if your player can output these over HDMI the 351R is
able to receive them in Multi-Channel PCM mode.
Surround sound modes cont.
Operating instructions
To activate the 351R, switch the Power button on the rear panel to On then
press the Standby/On button on the front panel.
Selecting the source
1. Select the desired source by pushing the corresponding source button on
the front panel or remote control.
2. If necessary, press the Audio Input Type button to select the input mode of
the source equipment, either analogue, digital or HDMI (depending on the
connection made on the rear panel). You may have already assigned this
in the 'Audio In. Select Menu' in the OSD.
The digital, analogue or HDMI icons on the display show which is the currently
selected input type.
Note:
The 351R stores the input type for each source so that it is automatically
recalled when that source is selected again.
Select an appropriate mode for the source material/type you are listening to
by pressing the Stereo or Surround Modes button and cycling through sub-
modes where available.
- Selects 2 channel Stereo operation for stereo material, pressing again
selects Sub mode.
This is a digitally processed mode that allows bass and treble controls, and
sub generation if required. The input can be either analogue (in which case it
will be turned into digital by 24 bit A/D conversion) or natively digital.
- Selects a range of digital surround modes for the appropriately digitally
encoded material.
Some Surround Sound types (such as the Dolby True HD and DTS HD Master
Audio) are available only from Blu-ray disc over HDMI.
Pressing the Surround Modes button will cause the 351R to lock onto
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bitstream type.
In some circumstances (see tables) pressing the button again will switch to
an alternative decoding option.
Dolby Pro Logic and Neo:6 are both available in various guises to decode
appropriately encoded soundtracks. Additionally DSP modes are available to
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used in the source material. Thus you must manually select these modes.
Pressing the Surround Modes button when the 351R has locked to a DD/DTS
bitstream will present more options where possible including Post-Processed
modes.
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surround-sound decoding. For instance Dolby Digital (2/0) + Pro Logic II
Music. Which adds a 5.1 ProLogic decode to a Stereo Dolby Digital decode to
turn 2 channel stereo into 5.1.
Surround channel description for reference:
(1/0)
- Mono, Centre channel only
(2/0)
- Left/Right stereo
(2/0).1
- Left/Right stereo and LFE (Sub)
(2/2)
- Left/Right stereo and Left/Right surround
(3/0)
- Left, Centre, Right
(3/0).1
- Left, Centre, Right and LFE (Sub)
(3/2).1
- 5.1: Left, Right, Centre, Left Surround, Right Surround and LFE
(Sub)
