Better Sound Using Phase Control And Full Band Phase Control - Pioneer SC-LX88 Operating Instructions Manual

06

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 frequency-amplitude charac-
teristics 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
during 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 frequency-phase characteristics across
all ranges.
Furthermore, the enhanced frequency-phase characteristics between channels ensure better surround sound
integration for multichannel setting.
! Upon shipment from the factory, the Phase Control function is in on status. If you perform Full Auto MCACC
(page 50 ) or Full Band Phase Ctrl of Auto MCACC
automatically turned on after measurement. By turning Full Band Phase Control on, the Phase Control func-
tion is turned on as well. Therefore, we recommend that usually the function be used with Full Band Phase
Control on.
1 Press MAIN RECEIVER to switch the remote control to the receiver operation mode, and
then press AUDIO P..
Use i/j to select 'PHASE'.
2
Use k/l to select 'FULLBND'.
3
Both the Phase Control and Full Band Phase Control functions are switched on. The FULL BAND and
tor, on the front panel lights.
Notes
! 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
transferring the measurement data to the computer using the CD-ROM, the original characteristics of group
delay of the speakers calibrated and the corrected characteristics of group delay can be displayed in 3-dimen-
sion on your PC. For details, refer to the operating instructions for the MCACC PRO PC Display Application
Software included on the CD-ROM.
! 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
79 .
(page 95 ), the Full Band Phase Control function is
Checking MCACC Data on page 100 ). Also, by
Setting the Audio options
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
speakers 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 making 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 Select the MCACC memory in which EQ Type is measured by FRONT ALIGN under the
MCACC (Selecting MCACC presets
4 Turn Full Band Phase Control on.
! Full Band Phase Control does not turn on with listening modes in which sound is only played on the front
speakers or the front speakers and subwoofer.
indica-
on page
67
Listening to your system
on page 66 ) of the audio parameter function.