<s>
Music	B-Application
visualization	I-Application
or	O
music	B-Application
visualisation	I-Application
,	O
a	O
feature	O
found	O
in	O
electronic	O
music	B-Application
visualizers	I-Application
and	O
media	B-Device
player	I-Device
software	O
,	O
generates	O
animated	O
imagery	O
based	O
on	O
a	O
piece	O
of	O
music	O
.	O
</s>
<s>
The	O
changes	O
in	O
the	O
music	O
's	O
loudness	B-Algorithm
and	O
frequency	O
spectrum	O
are	O
among	O
the	O
properties	O
used	O
as	O
input	O
to	O
the	O
visualization	O
.	O
</s>
<s>
Effective	O
music	B-Application
visualization	I-Application
aims	O
to	O
attain	O
a	O
high	O
degree	O
of	O
visual	O
correlation	O
between	O
a	O
musical	O
track	O
's	O
spectral	O
characteristics	O
such	O
as	O
frequency	O
and	O
amplitude	B-Application
and	O
the	O
objects	O
or	O
components	O
of	O
the	O
visual	O
image	O
being	O
rendered	O
and	O
displayed	O
.	O
</s>
<s>
Music	B-Application
visualization	I-Application
can	O
be	O
defined	O
,	O
in	O
contrast	O
to	O
previous	O
existing	O
pre-generated	O
music	O
plus	O
visualization	O
combinations	O
(	O
as	O
for	O
example	O
music	O
videos	O
)	O
,	O
by	O
its	O
characteristic	O
as	O
being	O
real-time	B-General_Concept
generated	O
.	O
</s>
<s>
Another	O
possible	O
distinction	O
is	O
seen	O
by	O
some	O
in	O
the	O
ability	O
of	O
some	O
music	B-Application
visualization	I-Application
systems	O
(	O
such	O
as	O
Geiss	O
 '	O
MilkDrop	B-Application
)	O
to	O
create	O
different	O
visualizations	O
for	O
each	O
song	O
or	O
audio	O
every	O
time	O
the	O
program	O
is	O
run	O
,	O
in	O
contrast	O
to	O
other	O
forms	O
of	O
music	B-Application
visualization	I-Application
(	O
such	O
as	O
music	O
videos	O
or	O
a	O
laser	O
lighting	O
display	O
)	O
which	O
always	O
show	O
the	O
same	O
visualization	O
.	O
</s>
<s>
Music	B-Application
visualization	I-Application
may	O
be	O
achieved	O
in	O
a	O
2D	O
or	O
a	O
3D	O
coordinate	O
system	O
where	O
up	O
to	O
6	O
dimensions	O
can	O
be	O
modified	O
,	O
the	O
4th	O
,	O
5th	O
and	O
6th	O
dimensions	O
being	O
color	O
,	O
intensity	O
and	O
transparency	O
.	O
</s>
<s>
The	O
first	O
electronic	O
music	B-Application
visualizer	I-Application
was	O
the	O
Atari	B-Application
Video	I-Application
Music	I-Application
introduced	O
by	O
Atari	O
Inc	O
.	O
in	O
1976	O
,	O
and	O
designed	O
by	O
the	O
initiator	O
of	O
the	O
home	O
version	O
of	O
Pong	B-Application
,	O
Robert	O
Brown	O
.	O
</s>
<s>
In	O
the	O
United	O
Kingdom	O
music	B-Application
visualization	I-Application
was	O
first	O
pioneered	O
by	O
Fred	O
Judd	O
.	O
</s>
<s>
Music	O
and	O
audio	O
players	O
were	O
available	O
on	O
early	O
home	O
computers	O
,	O
Sound	O
to	O
Light	O
Generator	O
(	O
1985	O
,	O
Infinite	O
Software	O
)	O
used	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
's	O
cassette	O
player	O
for	O
example	O
.	O
</s>
<s>
The	O
1984	O
movie	O
Electric	O
Dreams	O
prominently	O
made	O
use	O
of	O
one	O
,	O
although	O
as	O
a	O
pre-generated	O
effect	O
,	O
rather	O
than	O
calculated	O
in	O
real-time	B-General_Concept
.	O
</s>
<s>
For	O
PC/DOS	O
one	O
of	O
the	O
first	O
modern	O
music	B-Application
visualization	I-Application
programs	O
was	O
the	O
open-source	B-License
,	O
multi-platform	O
Cthugha	B-Application
in	O
1993	O
.	O
</s>
<s>
In	O
the	O
1990s	O
the	O
emerging	O
demo	O
and	O
tracker	B-Application
music	I-Application
scene	O
pioneered	O
the	O
real-time	B-General_Concept
technics	O
for	O
music	B-Application
visualization	I-Application
on	O
the	O
PC	B-Device
platform	O
;	O
resulting	O
examples	O
are	O
Cubic	O
player	O
(	O
1994	O
)	O
,	O
Inertia	O
Player	O
(	O
1995	O
)	O
or	O
in	O
general	O
their	O
real-time	B-General_Concept
generated	O
Demos	O
.	O
</s>
<s>
Subsequently	O
,	O
PC	B-Device
computer	O
music	B-Application
visualization	I-Application
became	O
widespread	O
in	O
the	O
mid	O
to	O
late	O
1990s	O
as	O
applications	O
such	O
as	O
Winamp	B-Application
(	O
1997	O
)	O
,	O
Audion	B-Application
(	O
1999	O
)	O
,	O
and	O
SoundJam	B-Operating_System
(	O
2000	O
)	O
.	O
</s>
<s>
By	O
1999	O
,	O
there	O
were	O
several	O
dozen	O
freeware	B-License
non-trivial	O
music	B-Application
visualizers	I-Application
in	O
distribution	O
.	O
</s>
<s>
In	O
particular	O
,	O
MilkDrop	B-Application
(	O
2001	O
)	O
and	O
its	O
predecessor	O
"	O
geiss-plugin	O
"	O
(	O
1998	O
)	O
by	O
Ryan	O
Geiss	O
,	O
G-Force	O
by	O
Andy	O
O'Meara	O
,	O
and	O
AVS	B-Application
(	O
2000	O
)	O
by	O
Nullsoft	O
became	O
popular	O
music	B-Application
visualizations	I-Application
.	O
</s>
<s>
AVS	B-Application
is	O
part	O
of	O
Winamp	B-Application
and	O
has	O
been	O
recently	O
open-sourced	O
,	O
and	O
G-Force	O
was	O
licensed	O
for	O
use	O
in	O
iTunes	B-Operating_System
and	O
Windows	B-Device
Media	I-Device
Center	I-Device
and	O
is	O
presently	O
the	O
flagship	O
product	O
for	O
Andy	O
Meara	O
's	O
software	O
startup	O
company	O
,	O
SoundSpectrum	O
.	O
</s>
<s>
In	O
2008	O
,	O
iTunes	B-Operating_System
added	O
the	O
"	O
Magnetosphere	O
"	O
visualizer	O
created	O
by	O
The	O
Barbarian	O
Group	O
.	O
</s>
<s>
There	O
have	O
been	O
applications	O
of	O
electronic	O
music	B-Application
visualization	I-Application
in	O
order	O
to	O
enhance	O
the	O
music	O
listening	O
experience	O
for	O
deaf	O
and	O
hard	O
of	O
hearing	O
people	O
.	O
</s>
<s>
Music	B-Application
visualization	I-Application
can	O
also	O
be	O
used	O
in	O
education	O
.	O
</s>
<s>
The	O
Cooper	O
Union	O
in	O
NYC	O
is	O
using	O
music	B-Application
visualization	I-Application
to	O
teach	O
deaf	O
children	O
about	O
sound	O
.	O
</s>
<s>
Atari	B-Application
Video	I-Application
Music	I-Application
,	O
designed	O
by	O
the	O
initiator	O
of	O
the	O
home	O
version	O
of	O
Pong	B-Application
,	O
Robert	O
Brown	O
,	O
and	O
introduced	O
by	O
Atari	O
Inc	O
.	O
in	O
1976	O
.	O
</s>
<s>
Pixelmusic	O
3000	O
,	O
open	B-License
source	I-License
music	B-Application
visualizer	I-Application
on	O
a	O
microcontroller	O
,	O
made	O
by	O
Uncommon	O
Projects	O
in	O
2008	O
.	O
</s>
<s>
Psychedelia	B-Application
(	O
1984	O
,	O
Jeff	O
Minter	O
)	O
,	O
an	O
early	O
"	O
light	B-Application
synthesizer	I-Application
"	O
,	O
did	O
not	O
use	O
audio	O
input	O
but	O
was	O
designed	O
to	O
create	O
visualizations	O
in	O
accompaniment	O
to	O
music	O
.	O
</s>
