Pioneer SC-82 User's Guide download pdf (Page 6)

Introduction MCACC MCACC ProThe Essence of MCACC Feature Comparison Technical DetailsAdvanced MCACC

MCACC Reference Guide

Advanced MCACC

Speaker Adjustment (size, level, distance, crossover)

Create the optimum acoustic environment with Pioneer’s

MCACC, developed with the expertise of professional recording

studios. The system — complete with custom microphone —

automatically compensates for differences in speaker size, level

and distance, and equalizes response.

More details on page 11

Equalizer

The frequency response of each speaker is measured and

adjusted for all bands. This is completed with the original

Envelope Compensation applied technology, which ensures

optimum timbre-matching with minimum phase variation

among channels. In addition to the calibration for frequency

response of MCACC, the Advanced MCACC features the time-axis

compensation, allowing manual or automatic point control of

acoustic treatment between 0 msec and 80 m sec points in 20

msec units. Minute adjustment allows you to create an ideal

sound field according to the acoustic characteristics of various

listening environments.

More details on page 12

Phase Control

When amplifying multi-channel audio signals,

receivers use a Low Pass Filter (LPF) to process

low-frequency signals for subwoofer output. This

causes “phase lag” — a delay of approximately 5

msec — of the low-frequency signals compared

to the main channel signals. As a result, the delayed bass makes

the sound lack synchronization. Pioneer’s Phase Control

technology effectively eliminates phase lag and significantly

improves the multi-channel sound without any extra operation.

Auto Phase Control Plus

During Blu-ray Disc/DVD/multi-channel file

playback, Auto Phase Control Plus makes real-time

analysis of the phase difference between the LFE

(low frequency effect) and the main signals, and

automatically compensates the gap. Elimination of

phase lag enhances strong bass and clear high-

frequency sound — especially effective for audio content such as

live performance and music video clips.

* Effectiveness depends on content

More details on page 13

Speaker Polarity Check

The Advanced MCACC will check the speaker polarity for proper

connection. “Reverse Phase” will be displayed on the GUI screen

if the speaker’s wiring (+ and -) is inverted.

Calibration

After Calibration

Speaker distance, sound pressure level, and

frequency response are all equalized.

Before Calibration

Speaker distance, sound pressure level, and

frequency response are all uneven.

The sound field is automatically

measured using the supplied mic.

Speaker sizes and number of

speakers are automatically detected.

SET-UP

MIC

SET-UP

MIC

Acoustic Calibration by MCACC

Before Calibration After Calibration

Level (dB)

Time (msec)

Frequency (Hz) Frequency (Hz)

Time (msec)

Level (dB)

MCACC Reverberation Characteristics

Reverb

Problems occur even with an ideal content which has no LFE delay. Phase Control

solves this within the AV receiver.

The "Phase Control" Compensates for the Delay of Low-Frequency Sound

Speakers

AV Receiver

PHASE CONTROL

Source

Effect of Auto Phase Control Plus (data comparison)

Original disc playback

Delay setting: 0 msec

Superior sound provided by compensating the lag in the subwoofer channel on the disc.

Playback with Auto Phase Control Plus

Delay setting: 9 msec TimeTime

Level

Front L

LFE

1 2 3 4 5 6 7 8 9 10 11 ... 16 17

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Pioneer SC-82 User's Guide Page 6

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