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Activating and deactivating this control, you can easily check if the feedback suppressor is deleting
feedback.
5.- You can choose the feedback detection sensitivity with the
SENSITIVITY
control wheel. There are 15
sensitivity levels. You can choose the best one for your needs. To start with it is best to choose an
intermediate position.
The
RESET STOP
position stops the feedback detection process and resets and restarts all the notch
filters. The
LED LOCK
and
ATTENUATION
indicators will blink.
6.- The
LOCK
control (
HPF/UPF
) lets you select the update mode for the notch filter parameters.
With the
LED LOCK
indicator on the feedback suppressor is in
HPF
(
Hold Parametric Filters
) mode.
In this case the 12 notch filters per channel are estimated, adjusted once, fixed and then stop feedback
detection. The
ATTENUATION
control adjustments have no effect. This mode can be used when the
microphones are in a fixed location.
If the
LED LOCK
indicator is switched off, the feedback suppressor is in
UPF
(
Update Parametric
Filters
) mode. The 12 notch filters per channel are set at the beginning and feedback detection continues
so that the notch filters are reset and reused if necessary. In this case the
ATTENUATION
control
adjustments do have an effect. This mode can be used with microphones which are not in one fixed
location.
7.- The
ATTENUATION (MPF/RPF)
control chooses the notch filters attenuation updating mode. This
control only has any effect when the UPF function is activated and the
LED LOCK
indicator is off.
When the
LED ATTENUATION
indicator is on, the
RPF
(
Release Parametric Filter
) mode has been
chosen. In this case the feedback suppressor gradually reduces the filter attenuation if it is not necessary,
removing the attenuation completely after a certain amount of time. If new feedback is produced, the
filter attenuation will be increased again.
With the
LED ATTENUATION
indicator off, the
MPF
(
Maintain Parametric Filter
) operating mode is
chosen. This is where the notch filter attenuation is fixed.
