Pioneer SC-LX82 Manuel d'utilisateur télécharger pdf (Page 66)

Listening to your system

Phase Control ON

• Rhythms with crystal-like clarity

• Bass sound with no loss of depth

• Sound of musical instruments with superb reality

Phase Control technology provides coherent sound

reproduction through the use of phase matching

for an

optimal sound image at your listening position. The

default setting is on and we recommend leaving Phase

Control switched on for all sound sources.

SC-LX82:

SC-LX72:

Set the remote control to the receiver operation

mode.

Press PHASE CTRL (PHASE CONTROL) to select

PHASE CONTROL.

The indicator on the front panel lights.

Using Full Band 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 three-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

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 calibrating 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.

Note

1 • Phase matching is a very important factor in achieving proper sound reproduction. If two waveforms are ‘in phase’, they crest and trough

together, resulting in increased amplitude, clarity and presence of the sound signal. If a crest of a wave meets a trough (as shown in the upper

section of the diagram above), then the sound will be ‘out of phase’ and an unreliable sound image will be produced.

• The PHASE CONTROL feature is available even when the headphones are plugged in.

• If your subwoofer has a phase control switch, set it to the plus (+) sign (or 0°). However, the effect you can actually feel when PHASE

CONTROL is set to ON on this receiver depends on the type of your subwoofer. Set your subwoofer to maximize the effect. It is also

recommended you try changing the orientation or the place of your subwoofer.

• Set the built-in lowpass filter switch of your subwoofer to off. If this cannot be done on your subwoofer, set the cutoff frequency to a higher

value.

• If the speaker distance is not properly set, you may not have a maximized PHASE CONTROL effect.

• The PHASE CONTROL mode cannot be set to ON in the following cases:

– When the PURE DIRECT mode is switched on.

– When the MULTI CH IN input is selected.

– When the HDMI audio output parameter is set to THROUGH in Setting the Audio options on page 85.

Front speaker

Subwoofer

Sound

source

Original sound

preserved with no

loss of clarity

Listening

position

SOURCE

RECEIVER

VOL

TV CONTROL

RECEIVER

iPod CTRL

HOME

STATUS

THX PQLSMPX

PHASE CTRL CH LEVEL

TUNE

PRESET PRESET

PGM MENU

STEREO

AUTO/ALC/

DIRECT

STANDARD ADV SURR

RETURN

PTY

PHASE CTRL

PHASE CTRL STATUS

REMOTE

SETUP

HDD

PGM

DVD

THX

AUDIO

MULTI OPE

INFO

DISP

MPX PQLS

RECEIVER

TV CTRL

TV/DTV

RECEIVER

PHASE CTRL

2 To calibrate and analyze the frequency-phase characteristics of the speakers, either follow the Full Auto MCACC procedure under Advanced

MCACC (see Automatically setting up for surround sound (Auto MCACC & Full Band Phase Control) on page 45), 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. Note that FULLBAND PHASE cannot be selected unless the frequency-phase characteristics of the speakers are calibrated.

3 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 Using Full Band Phase Control on page 66). Also, when your PC is connected to this receiver, 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 (see Output PC on page 117).

SC-LX82_LX72.book Page 66 Thursday, April 23, 2009 7:05 PM

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