User Manual

14.17. Component Editor
Drag & drop parameters into the Component Editor while holding down the < Ctrl > key on the keyboard to assign
them to the ProVisioniare Control page.
A detailed description of the components not listed below can be found at "ProVisionaire Design DME7
Component Guide."
14.17.1. Acoustic Echo Canceller Component Editor
Acoustic Echo Canceller (AEC) is a function that eliminates echoes caused by speaker reflections and wall
reflections (acoustic echoes), as well as constant noise from air conditioners, etc., all of which are problems
during teleconferences. By delivering clear audio that eliminates echoes and noise to the other party, smooth
conversations can be achieved during the teleconference.
Note that to eliminate the acoustic echo generated on the other party’s side, a system with an acoustic echo
canceller function must also be installed at their end.
Each MRX7-D can be equipped with AECs for up to 8 channels.
The following delay amount is added to the signal path where the AEC component has been placed.
When the word clock is 44.1kHz: 26.17msec
When the word clock is 48kHz: 24.02msec
The AEC inputs are as follows, from top to bottom.
• MicIn 1: Input from microphone
• MicIn 2: Input from microphone
• Reference: Input of a signal that you do not want to send to a remote location (a signal to be considered
an echo and removed) (e.g., Codec In)

MicIn 1 and MicIn 2 should be inputs from microphones in the same conference room.
■ AEC Editor
This configures the AEC-related settings. The left side of the screen is for settings related to the microphone
connected to MicIn 1, and the right side of the screen is for settings for the microphone connected to MicIn 2.
14. Audio Processor MRX7-D
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