Pioneer VSX-LX52 Operating Instructions Manual page 79

The Advanced MCACC menu
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).
Level
Acoustic Cal. EQ Pro.
calibration range
0 80
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.
Level
Acoustic Cal. EQ Pro.
calibration range
0
80
• 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
Note
1 If the Reverb View procedure is performed after the Automatically setting up for surround sound (Auto MCACC) on page 39 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.
2 The reverb characteristics after calibration can be displayed even after performing the Full Auto MCACC function (Automatically setting up
for surround sound (Auto MCACC) on page 39). In this case, the display shows the predicted reverb characteristics after calibration. If the
measurements are taken using the Reverb Measurement command (page 80) with the equalizer on, the actually measured reverb
characteristics after calibration are displayed.
Test tone
Conventional MCACC
EQ calibration range
Time
160
(in msec)
Low
frequencies
High
frequencies
Conventional MCACC
EQ calibration range
Time
160 (in msec)
channel frequencies/sounds.
Level
Acoustic Cal. EQ Pro.
calibration range
0
80
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.
1c.Manual MCACC
A/V RECEIVER
1. Fine Channel Level
2. Fine SP Distance
3. Standing Wave
4. EQ Adjust
5. EQ Professional
Exit Return
2 Select an option and press ENTER.
• Reverb Measurement – Use this to measure the
reverb characteristics before and after calibration.
(For graphical output using a PC, see Connecting a
PC for Advanced MCACC output on page 34 to
connect an RS-232C cable before selecting this
option.)
• Reverb View – You can check the reverb
measurements made for specified frequency ranges
1
in each channel. This can also be used to compare
the reverb characteristics before and after
2
calibration.
Front L
Front R
Conventional MCACC
EQ calibration range
Time
160 (in msec)
1c5.EQ Professional
A/V RECEIVER
a. Reverb Measurement
b. Reverb View
c. Advanced EQ Setup
Exit Return
10
79
En