Specifications

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Constant Directivity Horn Equalizer (CD Horn EQ)
Horn drivers commonly used in arrays in arenas and auditoriums have an inherent 6dB/octave high frequency rolloff. The
Converge Pro 880/840T CD Horn EQ compensates for this characteristic.
Converge Console Software
The Converge Pro setup and configuration software.
Crossover
A device that passes designated frequency segments of an audio signal to various loudspeaker elements in a sound
system.
Crossover, Bessel
A crossover using a low-pass filter design characterized by a linear phase response. This results in a constant time delay
throughout the passband.
Crossover, Butterworth
A crossover using a low-pass filter design characterized by a maximally flat magnitude response. This results in no
amplitude ripple in the passband.
Crossover, Linkwitz-Riley
A fourth-order crossover consisting of a cascaded second-order Butterworth low-pass filter. Offers a vast improvement
over the Butterworth crossover and is the de facto standard for professional audio active crossovers.
Decay Rate (slow, medium, fast)
Programs how quickly the audio level is attenuated once a channel has been gated off.
DSP Digital signal processor.
Echo Canceller Reference
The signal point which contains an electronic copy of all signals which will be removed from the signal the mics pick up.
This is always the far-end audio and, optionally, local program material.
Expansion bus
Consists of two RJ-45 connectors on the rear panel of the Converge Pro 880/840T. An expansion bus allows multiple
Converge Pro units to be networked together using category five twisted-pair (10BaseT) cable.
Filter
A device that passes and blocks audio signals based on user-definable requirements of the system.
Filter, 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.
Filter Display
A group of nodes plotted on a logarithmic scale. The Converge Pro 880/840T filter display can be accessed through the
Inputs 1–8/1–4, From Processing, or To Processing windows.
Filter, High Pass
A filter that passes high signal frequencies while attenuating low frequencies. The gain or loss
Filter, 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.
Filter, Low Pass
A filter that passes low frequencies while attenuating high frequencies.
Filter, 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.