Pioneer SC-LX85 - Manual (Page 48)

En 48
06 Listening to your system
Better sound using Phase
Control and Full Band Phase
Control
This receiver is equipped with the two types
of functions that correct phase distortion and
group delay: Phase Control and Full Band
Phase Control. Activating Full Band Phase
Control is strongly recommended because it
also involves the effects of Phase Control.
The Full Band Phase Control feature calibrates
the frequency-phase characteristics of the
speakers connected.
Standard speakers designed exclusively for
audio use generally reproduce sound with the
divided frequency bands output from a speaker
system consisting of multiple speakers (in
case of typical 3-way speakers, for instance,
the tweeter, the squawker (midrange), and the
woofer output sound in the high-, middle-, and
low-frequency ranges, respectively). Though
these speakers are designed to flatten the fre-
quency-amplitude characteristics across wide
ranges, there are cases where the group delay
characteristics are not effectively flattened. This
phase distortion of the speakers subsequently
causes group delay (the delay of low-frequency
sound against high-frequency sound) during
audio signal playback.
This receiver analyzes the frequency-phase
characteristics of the speakers by measuring
test signals output from the speakers with the
supplied microphone, therefore flattening the
analyzed frequency-phase characteristics dur-
ing audio signal playback - the same correction
is made for a pair of left and right speakers.
This correction minimizes group delay between
the ranges of a speaker and improves the fre-
quency-phase characteristics across all ranges.
Furthermore, the enhanced frequency-phase
characteristics between channels ensure better
surround sound integration for multichannel
setting.
1 Set the remote control to the receiver
operation mode.
2 Press PHASE CTRL (PHASE CONTROL) to
select FULLBAND PHASE.
Both the Phase Control and Full Band Phase
Control functions are switched on. The
FULL BAND and
indicator, on the front
panel lights.
Note
! To calibrate and analyze the frequency-
phase characteristics of the speakers,
either follow the Full Auto MCACC
procedure under Advanced MCACC
(see Automatically conducting optimum
sound tuning (Full Auto MCACC) on page
34), or set Auto MCACC menu under
Auto MCACC under ADVANCED MCACC to
Full Band Phase Ctrl. Select ALL when you
perform the Auto MCACC with Auto MCACC
menu. Upon calibration of the frequency-
phase characteristics of the speakers, the
Full Band Phase Ctrl feature is automatically
switched on.
! The original characteristics of group delay
of the speakers calibrated and the targeted
characteristics after correction can be
displayed graphically in the GUI screen (see
Checking MCACC Data on page 85). Also, by
transferring the measurement data to the
computer using the CD-ROM (AVNavigator),
the original characteristics of group delay of
the speakers calibrated and the corrected
characteristics of group delay can be
displayed in 3-dimension on your PC. For
details, refer to the operating instructions
for the Advanced MCACC PC Display
Application Software included on the CD-ROM
(AVNavigator).
! Depending on the input signal and listening
mode, it may not be possible to set the
Full Band Phase Ctrl mode to ON.
! The Full Band Phase Ctrl mode cannot be set
to ON in the following cases:
— When headphones are plugged in.
— When the PURE DIRECT mode is switched
on.
— When the HDMI audio output parameter is
set to THROUGH in Setting the Setting the
Audio options on page 57.
Using the Full Band Phase
Control’s FRONT ALIGN function
Full Band Phase Control calibrates frequency
phase disturbances (group delay) for the full
speaker band (Full Band) (SYMMETRY), but
with this unit it is also possible to calibrate the
frequency phase characteristics of other speak-
ers to the frequency phase characteristics of
the front speakers (FRONT ALIGN).
Full Band Phase Control calibration can be
performed in the FRONT ALIGN mode by mak-
ing the settings and performing the operations
below.
1 Perform Full Band Phase Control
measurements with the Full Auto MCACC
(or Auto MCACC) procedure.
2 Perform measurements with EQ Type
set to FRONT ALIGN with the Full Auto
MCACC (or Auto MCACC) procedure.
3 Press the MCACC button to select
the MCACC memory at which the
measurements performed with EQ Type
set to FRONT ALIGN are stored.
4 Turn Full Band Phase Control on.