JBL KX200, Руководство пользователя

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10
KX200
Section 3
Processing & Parameters
3.2 AFE
The AFE Automatic Feedback Elimination function was designed to provide an excellent
feedback elimination processing, all of these feedback detection and suppression is done
be AFE automatically completely. With AFE, the feedback is removed automatically and
the proprietary, precision AFE filters remove only a very narrow fraction of the frequency
spectrum, to keep a good and live sound after suppression.
AFE Parameters
The AFE algorithm contains the following parameters:
•
AFE mode: On/Off, Level(1,2,3)
•
AFE suppress method: 36 filters
•
AFE filter Q: 1/20 Octave
•
AFE feedback reaction time(one filter): 0.1S----0.5s
3.3 ECHO
The Echo effect consists of delays which generate the artificial echos. In an echo effect, the
processed signal is mixed with the unprocessed signal and is used to make a singer’s voice
sound more interesting. Echo has adjustable time, feedback and level for producing that
sought after karaoke effect.
Echo Parameters
The Echo algorithm contains the following parameters:
• MIC Dry Level (-40 – 10 dB) - This parameter adjusts the overall level of the
microphone input.
• Echo Level (-40 - 0 dB) - This parameter adjusts the overall level of the echo effect.
Use this parameter to add just the right amount of echo effect to the source signal.
• Echo Pre-Delay (0 ms - 100 ms; range is preset dependent) - This parameter adjusts the
amount of delay which occurs before you begin to hear the first- repeats.
• Echo Delay Time (50 ms - 500 ms; range is preset dependent) - This parameter adjusts
the amount of delay which occurs before you begin to hear any repeats.
• Echo Repeat (0 - 100%) - This parameter adjusts how many times the delay will be
repeated. The higher the value of this parameter, the longer the delay effect will be
heard before fading out.
• R CH Pre-Delay (-50% - 50%; referring to L channel)
• R CH Delay (-50% - 50%; referring to L channel)
• Echo LPF (20 Hz - 20000 Hz) - This parameter adjusts the frequency of the echo low
pass filter. Higher values allow more of the high frequencies to pass, creating a brighter
Echo effect. Lower values will begin to cut off the higher frequencies, creating a darker
sounding echo effect.
• Echo HPF (20 Hz - 20000 Hz) - This parameter adjusts the frequency of the echo
high pass filter. Lower values (or Off) allow more of the low frequencies to be passed
through the effect and yield a fuller sounding echo, whereas higher values begin to
cut off lower frequencies, creating a thinner sounding echo effect which can make the
effect sit better in a busy mix.