Operation; Automatic Filters; Working With Programs; Recalling Programs - Optimus LS-320 Manual De Instalación Y Funcionamiento

4. OPERATION

4.1 Automatic filters

It operates in 2 modes: Single-Shot and auto mode. In order to find a feedback, it divides the entire
frequency range in small steps and determines the level of those individual bands. It compares
those values to the level of the entire signal. The difference of these levels determines whether a
filter is set. This way the algorithm provides the best feedback recognition.
Filters in Single-Shot mode automatically analyze the music signal to detect feedback frequencies.
Having detected such a frequency, the filter automatically configures its parameter to suppress
feedback as efficiently as possible. As the filter is locked to the detected frequency, this mode is
ideally suited to suppress feedback having a constant frequency. Possible applications are "fixed-
position" microphones e.g. fixed installation in conference room.
All microphones that are moving during a performance (e.g. vocal mics) very often have varying
feedback frequencies. This type of feedback should be suppressed in Auto mode. As in Single-
Shot mode, the filter automatically selects an ideal setting for feedback suppression. But in Auto
mode a locked filter tracks and suppresses the feedback frequency even if it changes. The
optimum frequency is selected automatically and the filter is set to narrow-band mode to minimize
undesired effects on the audio signal.

4.2 Working with programs

In order to store your favorite settings, it has nine user presets and a default preset. All operating
parameters can be saved. Stored programs will remain in the unit's internal memory even after it
has been switched off. All presets have, when default, 6 SING filters and 6 AUTO filters.
4.2.1

Recalling programs

After start-up, the display reads the number of the preset last used. The jog wheel allows you to
conveniently select the preset of your choice.
4.2.2

Choice of mode

Each filter mode's display messages can be recognized.
DISPLAY
AUTO
SING
LS-320 Version 3.0
OPERATION MODE
Auto
Single-Shot
Feed Back Suppressor
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