Pioneer VSX-LX52 Manuel d'utilisateur télécharger pdf (Page 78)

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).

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 a

nalysis, 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 char acteristics can be somewhat differ ent for

each channel. Since this difference increases as the

sound is influenced by the various room

characteristics, it is often better to capture a

frequen

cy 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 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

in each channel.

This can also be used to compare

the reverb characteristics before and after

calibration.

Level

Test tone

Acoustic Cal. EQ Pro.

calibration range

Conventional MCACC

EQ calibration range

Time

(in msec)

160

Level

Low

frequencies

Acoustic Cal. EQ Pro.

calibration range

Time

(in msec)

80 160

High

frequencies

Conventional MCACC

EQ calibration range

Note

1If 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 charac

teristics 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.

2The 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 disp lay shows the predicted reverb characteristics after calibration. If the

measurements are taken using the Reverb Measurement command (page 79) with the equalizer on, the actually measured reverb

characteristics after calibration are displayed.

Level

Front L

Acoustic Cal. EQ Pro.

calibration range

Time

(in msec)

80 160

Front R

Conventional MCACC

EQ calibration range

1. Fine Channel Level

2. Fine SP Distance

3. Standing Wave

1c.Manual MCACC

4. EQ Adjust

5. EQ Professional

A/V RECEIVER

Exit Return

a. Reverb Measurement

b. Reverb View

c. Advanced EQ Setup

1c5.EQ Professional

A/V RECEIVER

Exit Return

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Pioneer VSX-LX52 Manuel d'utilisateur Page 78

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