Dolby Pro Logic and Neo:6 are both available in various guises to decode
appropriately encoded soundtracks. Additionally DSP modes are available to
process sources with no encoding at all. Due to the matrix encoding process
none of these modes incorporate flags that tell the 651R/751R the type of
encoding used in the source material. Thus you must manually select these
Pressing the Surround Modes button when the 651R/751R has locked to a
DD/DTS bitstream will present more options where possible including Post-
These are modes that allow extra processing to be applied after the main
surround-sound decoding. For instance Dolby Digital (2/0) + Dolby Pro Logic
II Music. Which adds a 5.1 Dolby Pro Logic decode to a Stereo Dolby Digital
decode to turn 2 channel stereo into 5.1.
For 7.1 Speaker setups, the number of decoding possibilities increases as
shown in the following ‘Decode modes’ tables. Several extra Post Processing
modes are available using either Dolby Pro Logic IIx or Neo:6.
To activate the 651R/751R, switch the Power switch 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/Out Setup Menu’ in the OSD.
The digital, analogue or HDMI icons on the display show which is the
currently selected input type.
Note: The 651R/751R stores the input type for each source so that it is
automatically recalled when that source is selected again.
Selecting the desired listening mode
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.
In all cases the first time a mode button is pressed the 651R/751R will
report the current decoding mode on the front panel display. Pressing the
button again will then cycle to the next available mode (if there is one). If no
button is pressed for 4 or 5 seconds the 651R/751R returns to normal
operation without changing mode.
Stereo Modes - Selects 2 channel Stereo operation for stereo material,
pressing again selects Stereo + 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.
Surround Modes - Selects a range of digital surround modes for the
appropriately digitally encoded material
Note: Some Surround Sound types (such as the Dolby and DTS HD) are
available only from Blu-ray disc over HDMI.
Pressing the Surround Modes button will cause the 651R/751R to lock onto
the incoming bitstream and select the first available mode for the current
In some circumstances (see tables) pressing the button again will switch to
an alternative decoding option.
Incoming Dolby Digital/DTS streams are always shown on the front
panel display as Dolby Digital (x/x).x or DTS (x/x).x, where the
bracketed numbers indicate the active channels in the source material
Active output channels are shown by the icons on the right hand side
of the front panel display. Possible incoming DD/DTS types are:
(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
(3/4).1 - 7.1: Left, Right, Centre, Left Surround, Right Surround,
Surround Back Left, Surround Back Right and LFE (Sub)