Room Correction; Introduction - Meridian C61R Installation Manual

The C61R digital surround controllers incorporate room correction, which takes advantage
of advanced digital signal processing techniques to compensate for room artefacts, including
resonances and reflections, to give a significant improvement in the sound.
This chapter explains how to use Meridian Room Correction to create profiles for use with the

Introduction

The Meridian Room Correction procedure creates a set of one or
more room correction profiles matched to your room. These are
then downloaded to the digital surround controller and can be
associated with particular presets, or selected from the front panel.
Selecting a profile applies a set of digital filters individually to each
speaker to achieve the required room correction.
If you use a single speaker layout you may choose to have one
room correction profile, and use this with all presets. If you
have separate speaker layouts for use with Music, Logic, and
5.1 Movie sources you will need to calculate a separate room
correction profile for each speaker layout. These will then be
selected automatically by the digital surround controller depending
on the audio format. In addition, you can create separate room
correction profiles to take account of changes to the room, such
as the position of large items of furniture, or with curtains open
or closed.

Room Correction

digital surround controller.
How room correction profiles are
calculated
Calculating a room correction profile is a time-consuming and
mathematically complicated process. Meridian Room Correction
performs the necessary sequence of measurements and
calculations automatically, using a PC connected to the digital
surround controller, with the minimum of interaction. It works as
follows:
First you need to set up a microphone close to the listening
position, and connect this to an appropriate input on the digital
surround controller. On the C61R, G61R, or G68 Digital Surround
Controller this will be A8 (L). On the 861 Reference Digital
Surround Controller this can be any analogue input; input A1 on
card IA00 is chosen by default.
Usually a standard sound pressure level meter will be used as
a microphone; this can be the same one used for setting the
 
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