Pioneer VSX 920 Operating Instructions Manual Download Page 39

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Listening to your system

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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.

•

Press

, then press PHASE to

switch the Phase Control on or off.

Listening with Acoustic
Calibration EQ

You can listen to sources using the Acoustic
Calibration Equalization set in

Automatically

setting u

for surround sound (MCACC)

page 31. Refer to these pages for more on
Acoustic Calibration Equalization.

•

While listening to a source, press

, then press EQ to switch the

Acoustic Calibration EQ on or off.

The MCACC indicator on the front panel lights
when Acoustic Calibration EQ is active.

Using surround back channel
processing

You can have the receiver automatically use
6.1 or 7.1 decoding for 6.1 encoded sources
(for example, Dolby Digital EX or DTS-ES), or
you can choose to always use 6.1 or 7.1
decoding (for example, with 5.1 encoded
material). With 5.1 encoded sources, a
surround back channel will be generated, but
the material may sound better in the 5.1
format for which it was originally encoded (in
which case, you can simply switch surround
back channel processing off).

• With a 7.1-channel surround system,

audio signals that have undergone matrix
decoding processing through surround
back channel processing to which the Up
Mix function is added are output from the
surround back speakers.

•

Press

, then press SB CH

repeatedly to cycle the surround back
channel options.

Each press cycles through the options as
follows:

•

SB ON

–

Matrix decoding processing for

generating the surround back component
from the surround component is turned on.

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.
• 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 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

in the following cases:

– When the

PURE DIRECT

mode is switched on.

– When the headphones are connected.

2 You can’t use Acoustic Calibration EQ with Stream Direct mode and it has no effect with headphones.

INPUT SELECT