Behringer SHARK DSP110 - Manual (Page 19)

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SHARK DSP110
between microphones, without producing any unpleasant side effects.
A typical Gate application is the processing of vocal tracks. Especially when using a
Compressor, the distance between microphone and singer is critical: as the distance
increases, more and more disturbing background noise is picked up. Use the Gate
function to fade out unwanted interference “inaudibly” during music pauses. In live
applications, e.g. crosstalk of drum and piano tracks can be suppressed or acoustically
“contaminated” recordings can be cleaned.
When a singer sings into a stage microphone, the background noise is masked and
hence not perceived. During music pauses, however, the microphone picks up the
noise produced by the P.A. system and monitor speakers, which can lead to unpleasant
feedback.
When you insert the SHARK in a vocal channel and adjust it so that it mutes the
channel, as long as the microphone is not in use, susceptibility to feedback can be
reduced enormously. Basically, all stage microphones should be treated in this way.
The GATE LEARN function helps you adjust the Gate threshold. Use this function
before the concert and after the sound check. If the adjusted value yields unsatisfactory
results, the UP/DOWN buttons can be used to fine-tune the Gate, until it closes only
during signal pauses and suppresses interference efficiently.
2.5 The Low Cut filter in the SHARK
In miking it is quite common to fade out low-frequency signal portions such as stage
rumble, pop sounds or other types of interference. Frequencies of that kind often have
high amplitudes and not only affect the sound image but can also damage power amps
and/or loudspeakers. The SHARK is equipped with a tunable high pass filter that features
a very high slope. Press the LOW CUT button to tune the cutoff frequency from 20 Hz
through 150 Hz with the UP/DOWN buttons, so that interference noise is faded out as
perfectly as possible, while the wanted signals remains unaffected.
2.6 The Compressor function
In broadcast and recording applications, signal levels often exceed the headroom of
signal-processing devices, which means that the dynamic range must be reduced to
avoid distortion. This is usually accomplished by the use of Compressors or Limiters,
which use an automatic gain control circuit to reduce the signal level during loud
passages. In this way, it is possible to compress the dynamics of a microphone channel
2. APPLICATIONS