JBL Synthesis SDP-45 4K - Manual (Page 46)

Surround Mode
JBL SYNTHESIS SDP-45
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SDP-45 SURROUND MODES
Pressing the SURROUND left and right arrow buttons button will allow you to sequentially select one of the many available decoding modes for expand or
upmix almost any source signal into the maximum number of output channels the SDP-45 is configured to use. The custom SDP-45 Surround Modes use
a set of DSP algorithms to create a set of simulated surround sound signals from the original left and right 2 channel data or can increase a 5.1 signal to
7.1 outputs. The surround mode can also be a result of the incoming digital audio stream, and may be encoded onto the disc or broadcast signal as a
discrete multi-channel, or encoded multichannel format.
The available surround modes are dynamic and not all modes are available at all times, dependent on the source and source content.
o 2.0 to 5.1 or 7.1 modes: These include the Dolby Pro Logic, Pro Logic IIx, DTS Neo6, Club, Party and Stereo7 modes. When these modes
are used the 2 channel signal is ―upmixed‖ to more channel outputs. In these listening modes the original content is used to create more
channels and fill the outputs available.
o 5.1 discrete to 7.1 modes: When the input signal format is a discrete input format, including
o 7.1 discrete modes:
All surround modes pass through the bass management as set for that source unless the 2-Channel Bypass is engaged.
The SDP-45 uses ―last used‖ logic, and remembers the last used surround mode that was valid. If the last used mode is not valid, a valid mode will
be automatically selected. This selection is remembered even if the SDP-45 is turned off.
The surround mode memory is affected by the GLOBAL / INDIVIDUAL parameter located in source setup. If GLOBAL is chosen then all sources
will apply the same surround mode for each logical signal format. If the parameter is set to INDIVIDUAL then each input will allow for and
remember different playback surround mode choices.
PASS THROUGH: No additional output processing is applied. Only the
input processing (if needed) and bass management is enabled.
STEREO7: The Stereo7 (Seven-Channel Stereo) Mode converts stereo
input to surround sound. The stereo signal is distributed to the 7
SAT/CBL channels plus sub-woofer, creating a giant stereo image in
your listening space.
STEREO7x: This post processing uses a matrix decoder and a complex
array of delay and reverberation processing to create a pseudo surround
sound effect from a stereo input signal.
PARTY: The Party (Seven-Channel Mono) Mode converts stereo input
to a mono signal which is then distributed to the 7 channels plus sub-
woofer.
CLUB: This Sound Field Mode is intended to simulate being fairly close,
around 10 feet away, in a small intimate club setting with a moderate
amount of reverberation that does not destroy clarity. The result is a bit
colored for speech due to the small room size, but it is quite suitable for
jazz groups, cabaret, small-
venue rock ‗n roll, and a small disco venue
where dance music is played. This mode can also be used for classical
chamber music and solo instrumental music of most kinds.
DOLBY PRO LOGIC: Dolby Surround/Pro Logic is based on basic
matrix technology. When a Dolby Surround soundtrack is created, four
channels of sound are matrix-encoded into an ordinary stereo (two
channel) sound track. The Center channel is encoded by placing it
equally in the left and right channels; the rear channel is encoded using
phase shift techniques. A Pro Logic decoder/processor ―unfolds‖ the
sound into the original 4.0 surround
—left and right, Center, and a single
limited frequency-range mono rear channel.
DOLBY PLII NATURAL: PLII Natural mode enhances the basic stereo
reproduction by using the inherent acoustics recorded within the source
material. If the source material was surround encoded or recorded in an
acoustically oriented manner (such as symphonic music and many live
recordings) this mode can provide an enhanced sense of the space in
which the music was being performed.