CONSOLE AI | Managing Channels (CP2) | 262
Filter Type Description
designated frequency occurs at a fixed 6dB/octave rate. The gain or
loss above the corner frequency is adjustable to +/- 15dB.
Linkwitz-Riley Crossover 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.
Low Pass Passes low frequencies while attenuating high frequencies. Selectable
frequency cutoff is 20.00Hz to 20.00kHz. Rolloff is 12dB/octave. Level
is fixed at 0dB.
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.
Notch Passes most frequencies unaltered, but attenuates those in a
specified range (e.g., the notch). Center frequency range is 20.00Hz
to 20.00kHz. Bandwidth is from 0.05 to 5.00 octaves in 0.01 octave
increments. Level is fixed at -80dB.
PEQ (Parametric Equalizer) A multi-band variable equalizer with control of gain, center frequency,
and bandwidth. A properly configured PEQ enables Converge Pro
devices to offset speaker anomalies and room acoustic imaging
deficiencies. Center frequency range is 20Hz to 20kHz in 0.01Hz
increments. Bandwidth is 0.05 to 5 octaves in 0.01 octave increments.
Level range is -15 to +15dB in 0.5dB increments.
Depending on the filter type you choose, some additional options become available.
10.(Optional) If you don’t want to use default values, change the filter options, as described in the table
below.
Option Description
Frequency The center frequency for the filter you are configuring. Range is from
20Hz to 20kHz in 1Hz increments. The default is 1kHz.
Gain (dB) (HighShelving,
LowShelving, Notch, and
PEQ only)
The gain value for the filter you are configuring. Range is from -15 to
15dB. The default is 0dB.
Q (Notch and PEQ only) Quality factor. the ratio of the center frequency divided by the
bandwidth. Q is the inverse of bandwidth, and the two parameters are
linked. Therefore changing the Q value also changes the bandwidth
value. Range is from 0.18 to 28.85.
Bandwidth (Notch and PEQ
only)
The difference between the upper and lower points of a filter’s audio
passband. Bandwidth is the inverse of Q, and the two parameters are
linked. Hence changing the bandwidth value also changes the Q value.
The range is 0.05 to 5.00 octaves.
Slope (Bessel, Butterworth,
and LinkwitzRiley only)
The highpass or lowpass cutoff slope. A higher slope means that the
frequencies near the cutoff point are attenuated more quickly (greater
attenuation per frequency octave).
High/Low (Bessel,
Butterworth, and
LinkwitzRiley only)
Whether to pass high frequencies or low frequencies.
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