<s>
Amplitude	B-Application
is	O
a	O
music	B-Application
video	I-Application
game	I-Application
developed	O
by	O
Harmonix	O
for	O
the	O
PlayStation	B-Device
2	I-Device
.	O
</s>
<s>
It	O
is	O
the	O
sequel	O
to	O
Frequency	B-Application
.	O
</s>
<s>
In	O
Amplitude	B-Application
the	O
player	O
controls	O
a	O
beat	O
blaster	O
ship	O
across	O
a	O
lane	O
of	O
six	O
tracks	O
,	O
each	O
track	O
representing	O
a	O
musical	O
instrument	O
and	O
containing	O
note	O
gems	O
that	O
the	O
player	O
shoots	O
at	O
in	O
time	O
with	O
the	O
music	B-Application
.	O
</s>
<s>
Compared	O
to	O
the	O
original	O
Frequency	B-Application
which	O
used	O
more	O
electronica	O
and	O
trance	O
music	B-Application
,	O
Amplitude	B-Application
included	O
additional	O
pop	O
rock	O
songs	O
in	O
its	O
soundtrack	O
.	O
</s>
<s>
While	O
the	O
game	O
was	O
met	O
with	O
a	O
critical	O
applause	O
and	O
a	O
decent	O
financial	O
success	O
,	O
this	O
would	O
later	O
elevate	O
Harmonix	O
into	O
a	O
major	O
studio	O
in	O
the	O
development	O
of	O
music	B-Application
games	I-Application
.	O
</s>
<s>
In	O
2014	O
,	O
Harmonix	O
successfully	O
offered	O
a	O
Kickstarter	O
campaign	O
to	O
raise	O
over	O
$	O
840,000	O
in	O
funds	O
to	O
build	O
a	O
new	O
Amplitude	B-Application
game	O
for	O
PlayStation	B-Operating_System
3	I-Operating_System
and	O
4	B-Operating_System
consoles	O
;	O
the	O
reboot	O
was	O
released	O
in	O
January	O
2016	O
.	O
</s>
<s>
In	O
Amplitude	B-Application
,	O
the	O
player	O
controls	O
a	O
ship	O
(	O
referred	O
to	O
as	O
a	O
"	O
Beat	O
Blaster	O
"	O
)	O
moving	O
down	O
a	O
path	O
of	O
varying	O
shapes	O
and	O
lengths	O
,	O
containing	O
up	O
to	O
six	O
tracks	O
.	O
</s>
<s>
Each	O
color-coded	O
track	O
corresponds	O
to	O
a	O
different	O
aspect	O
of	O
the	O
song	O
,	O
such	O
as	O
percussion	O
,	O
synth	B-Application
,	O
bass	O
,	O
or	O
vocals	O
,	O
and	O
contains	O
a	O
sequence	O
of	O
notes	O
.	O
</s>
<s>
Such	O
powerups	O
allow	O
immediate	O
capturing	O
of	O
tracks	O
,	O
doubling	O
of	O
points	O
scored	O
,	O
slowing	O
down	O
the	O
speed	O
of	O
play	O
,	O
and	O
jumping	O
into	O
freestyle	O
mode	O
(	O
which	O
allows	O
the	O
player	O
to	O
riff	O
to	O
the	O
music	B-Application
,	O
gaining	O
points	O
without	O
the	O
difficulty	O
of	O
playing	O
predefined	O
tracks	O
)	O
.	O
</s>
<s>
Amplitude	B-Application
offers	O
four	O
different	O
modes	O
of	O
play	O
:	O
single	O
player	O
game	O
,	O
remix	O
,	O
multiplayer	O
and	O
online	O
.	O
</s>
<s>
The	O
remix	O
mode	O
in	O
Amplitude	B-Application
is	O
much	O
like	O
the	O
one	O
in	O
Frequency	B-Application
.	O
</s>
<s>
Sony	O
of	O
America	O
shutdown	O
the	O
online	O
Amplitude	B-Application
servers	O
on	O
February	O
26	O
,	O
2007	O
,	O
with	O
the	O
online	O
servers	O
in	O
the	O
European	O
version	O
of	O
the	O
game	O
continuing	O
to	O
function	O
until	O
late	O
2011	O
.	O
</s>
<s>
There	O
are	O
26	O
songs	O
in	O
Amplitude	B-Application
,	O
the	O
majority	O
of	O
which	O
are	O
tracks	O
by	O
popular	O
music	B-Application
artists	O
,	O
with	O
genres	O
ranging	O
from	O
electronica	O
and	O
dance	O
to	O
hip	O
hop	O
and	O
alternative	O
rock	O
.	O
</s>
<s>
Some	O
of	O
the	O
tracks	O
,	O
however	O
,	O
were	O
produced	O
"	O
in-house	O
"	O
specifically	O
for	O
Amplitude	B-Application
.	O
</s>
<s>
Amplitude	B-Application
is	O
the	O
sequel	O
to	O
Harmonix	O
's	O
previous	O
title	O
,	O
Frequency	B-Application
,	O
released	O
in	O
2001	O
.	O
</s>
<s>
Frequency	B-Application
was	O
funded	O
and	O
published	O
by	O
Sony	O
,	O
and	O
while	O
not	O
a	O
commercial	O
success	O
,	O
was	O
considered	O
by	O
Harmonix	O
's	O
Ryan	O
Lesser	O
as	O
the	O
game	O
that	O
helped	O
to	O
give	O
Harmonix	O
a	O
positive	O
reputation	O
in	O
the	O
game	O
industry	O
.	O
</s>
<s>
In	O
making	O
the	O
sequel	O
,	O
the	O
team	O
considered	O
lessons	O
they	O
learned	O
from	O
Frequency	B-Application
to	O
make	O
Amplitude	B-Application
more	O
enjoyable	O
.	O
</s>
<s>
One	O
aspect	O
was	O
the	O
"	O
tunnel	O
"	O
approach	O
they	O
used	O
in	O
Frequency	B-Application
;	O
this	O
was	O
borne	O
out	O
from	O
trying	O
to	O
create	O
a	O
cyberspace-like	O
environment	O
based	O
on	O
concepts	O
from	O
the	O
movie	O
Tron	B-Language
as	O
to	O
help	O
create	O
a	O
synaesthesia	O
for	O
the	O
player	O
.	O
</s>
<s>
However	O
,	O
on	O
reflection	O
,	O
they	O
found	O
this	O
tunnel	O
to	O
be	O
limiting	O
and	O
claustrophobic	O
;	O
further	O
,	O
in	O
testing	O
an	O
initial	O
prototype	O
for	O
Amplitude	B-Application
,	O
they	O
found	O
that	O
when	O
they	O
left	O
the	O
tunnel	O
,	O
the	O
experience	O
of	O
seeing	O
the	O
tunnel	O
from	O
the	O
outside	O
inspired	O
the	O
idea	O
of	O
vaster	O
landscapes	O
.	O
</s>
<s>
This	O
prompted	O
the	O
team	O
to	O
change	O
from	O
the	O
tunnel	O
to	O
a	O
spread-out	O
track	O
for	O
Amplitude	B-Application
.	O
</s>
<s>
The	O
flatter	O
track	O
enabled	O
players	O
to	O
have	O
a	O
better	O
concept	O
of	O
where	O
they	O
were	O
on	O
the	O
instrument	O
spread	O
,	O
though	O
the	O
decision	O
was	O
criticized	O
by	O
fans	O
of	O
FreQuency	B-Application
.	O
</s>
<s>
The	O
second	O
factor	O
they	O
considered	O
was	O
that	O
both	O
Frequency	B-Application
and	O
Amplitude	B-Application
,	O
published	O
at	O
a	O
time	O
where	O
most	O
video	O
game	O
coverage	O
was	O
based	O
on	O
print	O
media	O
,	O
did	O
not	O
come	O
off	O
clearly	O
in	O
static	O
screenshots	O
.	O
</s>
<s>
They	O
came	O
up	O
with	O
the	O
idea	O
of	O
the	O
"	O
FreQ	O
"	O
,	O
an	O
avatar	O
that	O
would	O
be	O
on-screen	O
,	O
performing	O
with	O
the	O
music	B-Application
,	O
as	O
to	O
help	O
create	O
some	O
personality	O
with	O
the	O
game	O
;	O
the	O
FreQs	O
would	O
also	O
help	O
to	O
emphasise	O
the	O
player-vs-player	O
nature	O
during	O
multi-player	O
.	O
</s>
<s>
Amplitude	B-Application
sold	O
more	O
copies	O
than	O
its	O
predecessor	O
,	O
Frequency	B-Application
,	O
but	O
it	O
was	O
n't	O
considered	O
a	O
financial	O
success	O
for	O
Harmonix	O
.	O
</s>
<s>
The	O
game	O
received	O
"	O
favorable	O
"	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
GameSpot	O
named	O
it	O
the	O
best	O
PlayStation	B-Device
2	I-Device
game	O
of	O
March	O
2003	O
.	O
</s>
<s>
A	O
reboot	O
of	O
the	O
game	O
was	O
released	O
for	O
PlayStation	B-Operating_System
4	I-Operating_System
in	O
January	O
2016	O
,	O
and	O
for	O
PlayStation	B-Operating_System
3	I-Operating_System
in	O
April	O
2016	O
.	O
</s>
