Pioneer SC-LX90 - Manual (Page 48)

The System Setup menu 06
48
En
Setting Acoustic Calibration EQ Professional
according to your room characteristics
Using the manual setup, you can set the time period at
which the frequency response is analyzed, pinpointing
the time that is best for system calibration with your
particular room characteristics.
The graph below shows the difference between
conventional acoustic calibration and professional
calibration (the gray circle indicates the point where the
microphone captures sound during frequency analysis).
As soon as audio is output from your speaker system, it
is influenced by room characteristics, such as walls,
furniture, and the dimensions of the room. The sooner
the frequency analysis, the less it is influenced by the
room. We recommend an earlier time setting of
30~50ms to compensate for two major factors that will
influence the sound of most rooms:
• Reverberance of high vs. low frequencies –
Depending on your room, you may find that lower
frequencies seem overly reverberant compared to
higher frequencies (i.e. your room sounds ‘boomy’).
This may result in a skewed frequency analysis if the
measurement is done too late.
• Reverb characteristics for different channels –
Reverb characteristics can be somewhat different for
each channel. Since this difference increases as the
sound is influenced by the various room
characteristics, it is often better to capture a
frequency analysis early on for smoother mixing of
channel frequencies/sounds.
If your room isn’t affected by the factors above, it is often
not necessary to make a
30~50ms setting. Later time
settings may provide a more detailed sound experience
with your speaker system. It is best to try and see what
works best for your particular room.
Note that changing the room (for example, moving
furniture or paintings) will affect the calibration results.
In such cases, you should recalibrate your system.
Using Acoustic Calibration EQ Professional
1 Select ‘EQ Professional’, then press ENTER.
2 Select an option and press ENTER.
• Reverb Measurement – Use this to measure the
reverb characteristics of your room (for graphical
output using a PC, see
Connecting a PC for Advanced
MCACC output on page 69 to connect an RS-232C
cable before selecting this option).
• Reverb View – You can check the reverb
measurements made for specified frequency ranges
in each channel. 1
Level
Test tone
Acoustic Cal. EQ Pro.
calibration range Conventional MCACC
EQ calibration range
Time
(in msec)
0 80 160
Level
Low
frequencies
Acoustic Cal. EQ Pro.
calibration range
Time
(in msec)
0 80 160
High
frequencies
Conventional MCACC
EQ calibration range
Note
1 If the Reverb View procedure is performed after the Automatically setting up for surround sound (MCACC & Full Band Phase Control) on page 11 or Reverb
Measurement operation, depending on the standing wave control setting, differences may appear on the reverb graph. With the Auto MCACC function, the
reverberations are measured with the standing waves controlled, so the reverb characteristics graph shows the characteristics with the effect of the
standing waves eliminated. By contrast, the Reverb Measurement function measures the reverberations without controlling the standing waves, so the
graph indicates the reverb characteristics including the effect of the standing waves. If you wish to check the reverb characteristics of the room itself (with
the standing waves as such), we recommend using the Reverb Measurement function.
Level
Left
surround
Acoustic Cal. EQ Pro.
calibration range
Time
(in msec)
0 80 160
Right
surround
Conventional MCACC
EQ calibration range
: R e t u r n
a . F i n e C h a n n e l L ev e l
b . F i n e S P D i s t a n c e
c . P r e c i s i o n D i s t a n c e
d . S t a n d i n g Wav e
e . E Q A d j u s t
f . E Q P ro fe s s i o n a l
3 . M a nu a l M C AC C
DV D / L D - 5 5 . 0 dB
: R e t u r n
1 . R ev e r b M e a s u r e m e n t
2 . R ev e r b V i ew
3 . A dva n c e d E Q S e t u p
e . E Q P ro fe s s i o n a l
3 f. E Q P ro fe s s i o n a l
DV D / L D - 5 5 . 0 dB
E N T E R : N ex t
SC_LX90_WY.book Page 48 Wednesday, February 6, 2008 11:49 AM