<s>
In	O
digital	B-General_Concept
music	O
processing	O
technology	O
,	O
quantization	B-Application
is	O
the	O
studio-software	O
process	O
of	O
transforming	O
performed	O
musical	O
notes	O
,	O
which	O
may	O
have	O
some	O
imprecision	O
due	O
to	O
expressive	O
performance	O
,	O
to	O
an	O
underlying	O
musical	O
representation	O
that	O
eliminates	O
the	O
imprecision	O
.	O
</s>
<s>
The	O
purpose	O
of	O
quantization	B-Application
in	O
music	O
processing	O
is	O
to	O
provide	O
a	O
more	O
beat-accurate	O
timing	O
of	O
sounds	O
.	O
</s>
<s>
Quantization	B-Application
is	O
frequently	O
applied	O
to	O
a	O
record	O
of	O
MIDI	O
notes	O
created	O
by	O
the	O
use	O
of	O
a	O
musical	O
keyboard	O
or	O
drum	O
machine	O
.	O
</s>
<s>
Additionally	O
,	O
the	O
phrase	O
"	O
pitch	O
quantization	B-Application
"	O
can	O
refer	O
to	O
pitch	O
correction	O
used	O
in	O
audio	O
production	O
,	O
such	O
as	O
using	O
Auto-Tune	O
.	O
</s>
<s>
A	O
frequent	O
application	O
of	O
quantization	B-Application
in	O
this	O
context	O
lies	O
within	O
MIDI	O
application	O
software	O
or	O
hardware	O
.	O
</s>
<s>
MIDI	O
sequencers	O
typically	O
include	O
quantization	B-Application
in	O
their	O
manifest	O
of	O
edit	O
commands	O
.	O
</s>
<s>
Quantization	B-Application
in	O
MIDI	O
is	O
usually	O
applied	O
to	O
Note	O
On	O
messages	O
and	O
sometimes	O
Note	O
Off	O
messages	O
;	O
some	O
digital	B-General_Concept
audio	I-General_Concept
workstations	I-General_Concept
shift	O
the	O
entire	O
note	O
by	O
moving	O
both	O
messages	O
together	O
.	O
</s>
<s>
Sometimes	O
quantization	B-Application
is	O
applied	O
in	O
terms	O
of	O
a	O
percentage	O
,	O
to	O
partially	O
align	O
the	O
notes	O
to	O
a	O
certain	O
beat	O
.	O
</s>
<s>
Using	O
a	O
percentage	O
of	O
quantization	B-Application
allows	O
for	O
the	O
subtle	O
preservation	O
of	O
some	O
natural	O
human	O
timing	O
nuances	O
.	O
</s>
<s>
The	O
most	O
difficult	O
problem	O
in	O
quantization	B-Application
is	O
determining	O
which	O
rhythmic	O
fluctuations	O
are	O
imprecise	O
or	O
expressive	O
(	O
and	O
should	O
be	O
removed	O
by	O
the	O
quantization	B-Application
process	O
)	O
and	O
which	O
should	O
be	O
represented	O
in	O
the	O
output	O
score	O
.	O
</s>
<s>
For	O
instance	O
,	O
a	O
simple	O
children	O
's	O
song	O
should	O
probably	O
have	O
very	O
coarse	O
quantization	B-Application
,	O
resulting	O
in	O
few	O
different	O
notes	O
in	O
output	O
.	O
</s>
<s>
In	O
recent	O
years	O
audio	O
quantization	B-Application
has	O
come	O
into	O
play	O
,	O
with	O
the	O
plug-in	O
Beat	O
Detective	O
on	O
all	O
versions	O
of	O
Pro	B-Application
Tools	I-Application
being	O
used	O
regularly	O
on	O
modern-day	O
records	O
to	O
tighten	O
the	O
playing	O
of	O
drums	O
,	O
guitar	O
,	O
bass	O
,	O
etc	O
.	O
</s>
