Intro to Reverb - WordPress.com

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29 Νοε 2013 (πριν από 3 χρόνια και 8 μήνες)

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WALT


to define what reverb is in
order to understand how it is created.


Reverberation is the persistence of sound in a particular space
after the original sound is
produced.


A reverberation, or reverb, is created when a sound is
produced in an enclosed space causing a large number of
echoes to build up and then slowly decay as the sound is
absorbed by the walls and
air.


It is added to recordings made using close
mic

techniques.


Reverb levels can therefore be controlled by an engineer or
performer.


Reverb is an auxiliary effect.


Reverb can be found in guitar amplifiers, FX pedals, dedicated
hardware or added with a software plug
-
in.


Natural reverb is captured using ambient
mic

techniques. i.e.
more reverb is captured if a microphone is further away.


Omnidirectional or figure of 8 microphones pick up reverb
better than cardioid
mics
.


Room acoustics determine the nature of reverb.


In the 1950’s reverb was made by playing a dry signal in a
room, placing a loudspeaker at one end and an omnidirectional
mic

at the other.


The height and angle of the microphones affects the amount of
reverb.


These rooms had to be built using reflective material like stone
or concrete. (Garages or stairwells are popular with home
studios!


Large metal sheet! Sound
input by a speaker
-
like
transducer causing the sheet
to vibrate. Reflections from
the sheet are picked up by
microphone
-
like transducers.


Reverb time is controlled by
a dampening pad used to
absorb the reflections more
quickly!


Very expensive!


Gives very dense reverb
and still used today on
vocals.


Similar to plate reverb but a spring is used instead of a metal
sheet. It is also smaller and has a characteristic
twangy

sound.
Reverb time can be adjusted by the amount of tension in the
spring. Spring reverbs tend to have a mid
-
range boost and long
reverb time.


Appeared in the 1980’s.


A signal is input into a computer algorithm which consists of
many delays and echoes which emulate real spaces.


Is easily changed and adjusted. Early reflections are more
prominent than in spring/ plate reverb so they sound more
realistic.


Digital reverb is very heavy on the CPU. As CPU’s got faster the
realism of reverb improved.


In the late 1990’s digital reverbs became software plug
-
ins in
sequencing packages (like
cubase
).