Ashly Protea 4.8SP handleiding
Handleiding
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Operating Manual - PROTEA™ 4.8SP and 3.6SP System Processors
whereas a larger "wider" bandwidth produces an
audible change to the overall tone of a signal.
Parametric lters are best used to hunt down
and eliminate problem feedback frequencies,
add or remove a characteristic "hot spot" from
microphones, or clean up room resonance situa-
tions. It is well worth the time getting procient
with parametric EQ lters, as they oer the best
solution to many EQ problems.
Protea SP parametric filters have a
boost/cut range of +15dB to -30dB. There is
more cut than boost because one of the more
common uses for parametric lters is to dramati-
cally cut, or "notch out", very narrow frequencies
(low bandwidth) in order to eliminate system
feedback problems.
Every instance of a parametric EQ lter has a center frequency selected. The factory default is 1kHz, but each lter's
center frequency is adjustable from 19.7Hz to 21.9kHz in 1/24 octave steps. Carefully sweeping a narrow bandwidth lter through
a problem feedback area, with just a slight boost, is a quick way to nd the exact frequency causing trouble. Once the oensive
frequency has been found, cut the lters level, and then the bandwidth is adjusted as narrow as possible while still eliminating
the feedback problem. Bandwidth is adjustable from about 1/64 octave to four octaves, and the lower the bandwidth, the less
audible the lter action will be. Finding the problem frequency is relatively easy, but nding the best combination of cut and
bandwidth takes a little practice. Again, it is well worth the time becoming comfortable with the notching procedure, so that
problems can be quickly addressed with a sucient but minimal amount of correction.
The EQ functions on all four inputs and eight outputs are switched in or out on an individual channel basis. In other
words, each input or output has one "switch" for all of its EQ lters. If certain lters are not going to be used within a channel,
simply leave the gain for that lter at 0.0dB, and the lter will have no eect.
For an excellent interactive display of the way parametric and shelving lters work, experiment with the 4.8SP or 3.6SP
EQ section of Protea NE Software. The software works whether a unit is connected or not, so it is an invaluable teaching tool as
well as an audio setup tool for Protea products. The program is shipped with SP units, but is also available on the Ashly web site.
4.6c Delay
In large installations or outdoor
venues there are often many speaker
clusters in various locations to get the
best coverage possible. Since sound trav-
els relatively slow through air (1130 ft/s
at 20ºC), multiple loudspeaker locations
can create a situation where the original
audio signal, simultaneously leaving all loudspeakers, arrives at a single point in the venue at several dierent times. Needless
to say this causes problems, and what may be crystal clear sound directly in front of any one loudspeaker can be unintelligible
in the farther reaches of the venue with direct line-of-sound to multiple loudspeakers. The solution is to delay the audio signal
to the loudspeakers located beyond the main stage area, so that sound comes out of the distant loudspeakers at the exact time
that sound from the main stage loudspeakers arrives. Within the Protea SP, up to 682 milliseconds of time delay are available,
allowing secondary loudspeaker clusters to be time aligned with the primary speakers up to 771 feet (235m) away from the
main stage area.
Bekijk gratis de handleiding van Ashly Protea 4.8SP, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Ashly |
| Model | Protea 4.8SP |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 2937 MB |
