Glossary | 153 |
EC Reference summing The ability to include multiple signals in a single reference. See also Virtual Reference.
ERL Found in the Acoustic Echo Canceller window, the echo return loss (ERL) meter shows the coupling between the reference signal and the input to the echo
ERLE Found in the Acoustic Echo Canceller window, the echo return loss enhancement (ERLE) meter shows the loss through the echo cancellation and non- linear processing
Expansion Bus Consists of two
400.An Expansion Bus allows multiple XAP 400s to be networked together using category five
Expansion Bus reference One of the echo cancellation/PA adapt reference options. The Expansion Bus reference allows you to reference an output on a networked unit.
Filter A device that passes and blocks audio signals based on
•All Pass A filter that provides only phase shift or phase delay without appreciably changing the magnitude characteristic. The filter produces a flat amplitude response. It is useful for matching the delay of two processing channels with different delays.
•High Pass A filter that passes high signal frequencies while attenuating low frequencies. The gain or loss
•High Shelving Provides boosting or attenuation of frequencies above a designated frequency. The transition between the spectrum above and below the designated frequency occurs at a fixed 6dB/octave rate. The gain or loss above the corner frequency is adjustable to +/- 15dB.
•Low Pass A filter that passes low frequencies while attenuating high frequencies.
•Low Shelving Provides boosting or attenuation of frequencies below a designated frequency. The transition between the spectrum above and below the designated frequency occurs at a fixed 6dB/octave rate. The gain or loss below the corner frequency is adjustable to +/- 15dB.
Filter Display A group of nodes plotted on a logarithmic scale. The
XAP 400’s filter display can be accessed through the Inputs
