Linear Acoustic AERO.qc User Manual page 24

Linear Acoustic AERO.qc User Guide
Upmixing
Upmixing is the process whereby two channel audio can be re-mapped into 5.1 channels
using level and phase detection techniques. The proprietary, industry standard and road-
proven UPMAX
channel audio to be created from normal stereo inputs, and performs even better when
presented with matrix surround encoded two channel audio (i.e. LtRt). Two channel mono
can also be accommodated in an audibly pleasing manner.
Critically, the UPMAX algorithm is fully downmix compatible. Many viewers are present-
ed with Dolby Digital (AC-3) encoded audio that is downmixed in their set top box or re-
ceiver and they happily listen in stereo, none the wiser that more information is actually
present. Upmixing systems that use phase shifting techniques can produce unacceptable
results in these systems obscuring dialog and amplifying background artifacts.
• Upmix LfRf - Enter to set parameters for the Left Front/Right Front upmixer:
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TM
algorithm is incorporated in the AERO.qc. This allows for realistic 5.1
Enable Center - A checkmark indicates that the Center channel output of the
upmixer is being reproduced from the Center channel Main output. Un-
checked indicates that Center channel audio from the upmixer is re-combined
back into the other channels (no audio is lost). Default is Enabled.
Enable Surround - A checkmark indicates that the Surround outputs of the
upmixer are being reproduced from the surround Main outputs. Unchecked
indicates that Surround outputs of the upmixer are re-combined back into the
other channels (no audio is lost). Default is Enabled.
Enable LFE - A checkmark indicates that an LFE channel is being created to
produce the 0.1 channel of the upmixer. Default is Enabled.
Center Width - Controls how much of center channel output of the upmixer
is spread back into the Left and Right channel Main Outputs of the unit.!00%
width equals all Center channel information summed back into the Left and
Right outputs, while 0% equals all Center channel information sent to the Cen-
ter Channel output; Default is 33%.
Center Level - Allows minor adjustment of upmixed Center channel level.
Center Exclusivity - Active in UPMAX-II Only. Adjusts the degree to which
center channel information is excluded from the remaining channels, especially
the surround channels. Use with care at extreme ranges.
Use Center Width for 5.1 (On/Off) - Allows discrete center channel audio
to also be spread across the front channels by the percentage set by Center
Width. Useful for better integrating material mixed with only dialogue in the
center channel. Cleverly conceived by our friends David and Darren at As-
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Detailed Operation