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24
The Menus & Parameters
AFS Options Menu
The AFS Options menu houses all the parameters for the two channels. Following is a description of all the parameters found
in this menu.
CHANNEL [1, 2]
This parameter selects the channel to edit.
BYPASS [ON, OFF]
This parameter bypasses the selected channel and will override the channel’s BYPASS button on the front panel.
FILTER MODE [FIXED, LIVE]
This parameter determines whether the AFS algorithm will set Live or Fixed filters. See ‘The AFS Filters’ on page 16 for
further information on Fixed and Live filters.
CONTENT MODE [SPEECH, MUSIC, MUSIC/SPEECH]
This parameter sets the width of the AFS filters. The available options are:
• SPEECH (Constant bandwidth of 11 Hz below 76 Hz, constant Q of 7 at or above 76 Hz)
This option is optimized for speech sound reinforcement, where wider notch filters are less noticeable. Select this option
when using the sound reinforcement system for speech only. With this option selected, notch filters will be wider but will
provide the fastest, most solid protection against feedback.
• MUSIC (Constant bandwidth of 8 Hz below 927 Hz, constant Q of 116 at or above 927 Hz)
This option is optimized for live music sound reinforcement and offers the highest level of sonic quality. When this option
is selected, the AFS algorithm will zero in on the offending feedback frequency while leaving the surrounding frequencies
unscathed.
• MUSIC/SPEECH (Constant bandwidth of 9 Hz below 260 Hz, constant Q of 29 at or above 260 Hz)
This option is optimized for live music sound reinforcement or speech and provides the best all-around protection. It will
provide the best combination of fast feedback suppression and precision, using filters slightly narrower and less audible
than the SPEECH setting, but slightly faster than the MUSIC setting. If you’re not sure which setting to use, select this
option.
NOTE: To guarantee that feedback is suppressed using the minimum number of filters possible, AFS may
automatically widen filters. For example, if you had selected the MUSIC setting and an adjacent frequency is feeding
back, AFS will detect both frequencies, and if they are in close enough proximity, will set a single, wider filter rather than
two narrow filters. Using a single, wider filter rather than two narrow filters will not alter the sonic quality and will ensure
that the maximum number of filters will always be available for use. Automatically adjusted filter widths will never be any
wider than the SPEECH setting.
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