Provides one or more echoes of the original sound.
A delay set for just a 10 to 30ms makes the sound fuller, like
two people are singing.
Delays greater than 40ms are clearly noticeable.
Multi-tap delays give a repeating echo.
In large auditoriums where the main speaker system cannot
adequately cover the whole audience area, additional speakers may
be distributed to other parts of the room. Digital Delays are used
to delay the sound sent to the distributed speakers so that the
audience hears the sound from the main speakers and the sound from
the distributed speakers at the same time. If all the distributed
speakers are the same distance from the main speakers, a single
Delay can be used. If the distributed speakers are at different
distances, multiple Delays are needed.
Multi-Effects Processor
Provides a large variety of effects in a single unit.
Usually includes reverb, delay, multi-tap delay, chorus,
flange, tremolo, vibrato, gates, and other effects.
Some units allow effects to be combined.
Some units allow you to program your own effects (if you know
how).
Compressor / Limiter
Especially useful for a performer whose voice varies from
very quiet to very loud, beyond the dynamic range of the sound
system.
A compressor / limiter reduces the dynamic range of the sound.
It allows low volume sounds to pass through unchanged, but loud
sounds are reduced in level.
A compressor / limiter can be used to prevent over driving the
power amplifier. This prevents distortion and possible equipment
damage.
Gate
Especially useful to eliminate low level background
noise
A gate keeps the signal turned off until its volume reaches a
pre-set threshold, then it is turned on. When the signal becomes
quiet again it is turned off. This process happens very rapidly
and can be used to eliminate background noise when the person is
not speaking (even between words).
