Live mode – dbx AFS224 Manual User Manual
Page 19
15
AFS
™
224
AFS™ 224 User Manual
Live Mode
Live Mode allows feedback filters to be set and removed based on changes in the environment and is
designed to be used during a performance. The AFS 224 can be put into Live Mode by pressing the
feedback frequency. If there are additional occurrences of feedback, additional notch filters will be set until
all the Live filters are used. If new frequencies begin to feedback and no more Live filters are available, the
AFS algorithm will take the first Live filter set, and move it to the new feedback frequency. The AFS 224
will continue to “round robin” through the Live filters as new feedback is detected.
Using Live Filter Lift
Live Filter Lift provides maximum sonic integrity by removing unnecessary feedback filters. The Live Filter
Lift function provides a timer for each of the Live filters. This timer length can be adjusted by pressing the
The Live Filter Lift default time is 10 minutes from the factory. If Live Filter Lift is on, once a filter’s time
period has expired, the AFS algorithm will check to see if the feedback filter is still necessary. If no longer
needed, the notch filter will then slowly lift. If the filter is still required to eliminate feedback, the timer will
be reset. If Live Filter Lift is off, the notch filters will remain in place until they are cleared by the user, the
AFS 224 is power cycled, or until needed for other frequencies.
Using Types in Live Mode
As in Fixed Mode, the AFS 224 offers several feedback suppression types. These types control the width
of the notch filter used to remove the feedback. The Speech type uses wider notch filters allowing the AFS
224 to work faster. The Music types provide sharper notch filters than the Speech type, with up to 1/80th
of an octave in the Music High type (see AFS filter Q graph on the previous page). Pressing the
button switches between the different types. You can select different types for both Live and Fixed Mode.
Operation