CONSOLE AI | Introduction | 18
shown by the solid blue line. The BMA CT mic in ROOM B picks up the signal from the speaker and sends
it back to ROOM A, where it’s played from the speaker in ROOM A, as shown by the dotted blue line. The
dotted blue line represents the echo. Acoustic Echo Cancellation is designed to recognize and cancel the
kind of echo represented by the dotted blue line in the diagram.
Standard and Custom References
Standard References
AEC works by knowing which output signal to exclude from a particular input. This is called a standard
reference.
In the diagram above, to eliminate the echo, we would add the BMA CT speaker at the top of ROOM B
(which we’ll call SPEAKER 1) as a reference for the microphone in the BMA CT in ROOM B (which we’ll
call MIC 1). This tells the system to eliminate the signal from SPEAKER 1 when it’s picked up by MIC 1, so
that the signal does not get returned to ROOM A.
Custom References
There are times, however, when you want to create a reference but exclude certain channels from being
suppressed. To continue with the simple example shown in the diagram above, we may have a BMA CT
in ROOM B, and we want to create a standard reference as described earlier, to keep the output from the
BMA CT from going right back in to the BMA CT speakers, but we may have in the same room a handheld
mic that gets passed from speaker to speaker. In this case, we might want to create a custom reference
for the BMA CT speaker that excludes (or in other words does not block) the signal for the input channel
coming from the handheld mic. As we can see in this example, standard and custom references can be
used in the same room.
About Gating Groups
You can use gating groups to control the way microphones behave in relation to one another.
For example, when you are using several microphones, you may want only the mic into which someone
is currently speaking to be active (i.e., gated on), and for the rest of the microphones to be temporarily
attenuated down (i.e., gated off), to avoid introducing extraneous noise (a gating group feature called First
Mic Priority). Gating groups let you control these kind of relationships between several microphones.
Some gating settings are set on each microphone channel (see Changing Channel Properties - Mic/Line
Input AEC (CP2) for more information) and some are set using the gating group settings (see Changing
Gating Group Properties (CP2) for more information).
About Macros
A macro is a group of CONVERGE Pro 2 actions (called commands) stored together under a name you
choose. You can then execute all the commands stored in the macro. See Running a Macro for more
information.
Note:
You can also execute macros at a specified time, or times, using a Timer. See About Timers for
more information.
Command Types
The following list shows the kinds of commands that can be included in a macro:
• Set a route between audio devices (such as a microphone and a speaker) or groups of devices
• Change the properties of a channel
• Run another macro
CONSOLE AI User Manual
To Next Page
Loading...
