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Dynamic Range

Assignment for week 4 of Introduction to Music Production
by

Sergio Sánchez

on 27 February 2014

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Transcript of Dynamic Range

Dynamic Range
What is Dynamic Range?
Is the
loudness relationship
(in dB), between the
minimum
and
maximum

value
of any
sound
or electrical
phenomenon
.
For our
ears
, the
dynamic range
is 120 dB SPL, from
threshold of hearing
(0 dB SPL) to
threshold of pain
(120 dB SPL).
For
audio
systems,
dynamic range
can be defined as the range of amplitudes between the
noise floor
of the system and its onset of
clipping
.
Dynamic Range
is divided into two sections:
Signal to Noise Ratio
and
Headroom
.
Signal to Noise Ratio
is the range between some
nominal maximum signal
and the
noise floor
of the system.
Headroom
is the range
above
that nominal
maximum signal
to the onset of
clipping
.
So...
Headroom
+
Signal to Noise Ratio
=
Dynamic Range
.
One way to
manipulate dynamics
is to use
volume fader
and
volume automation
to bring the
volume up when the sound gets quiet and bring the level down when the sound gets loud
, this kind of "
macro dynamics
" is commonly known as "
riding the fader
".
Other way to
manipulate dynamics
in a "
micro scale
", where we can control the dynamic shape of a sound, transients, punchiness or impact is using
compression
and
expansion
.
Expansion
is the opposite process to compression, it actually
increase the dynamic range of a signal
. When a signal falls below a threshold level, the gain is decreased. "
making the louder parts even louder and making the quieter parts even quieter
".
Threshold of Hearing
0 dB SPL
Threshold of Pain
120 - 140 dB SPL
Noise Floor
Clipping
Noise Floor
Noise
U - Signal
S/N
Ratio
Headroom
U - Signal
Clipping
How can Dynamic Range be manipulated?
Hi! my name is
Sergio Sánchez
, I'm from Mexico and this is my presentation for week 3 of Introduction to Music Production at Coursera.org. This week my assignment is from "
Dynamic Range
".
Well, this is my lesson for
Dynamic Rage
, It's
important to understand
this concepts, I hope you like it and find it useful,
thanks
for taking the time to review my assignment,
until next time
.
Compression
is the automatic
reduction of gain
as the signal level increase beyond a preset level called the
threshold
.
The effect of compression is to
reduce the overall dynamic range of a signal
. by "
making the louder parts quieter and making the quieter parts louder
".
Full transcript