<s>
Moodbar	B-Application
is	O
a	O
computer	O
visualization	B-Application
used	O
for	O
navigating	O
within	O
a	O
piece	O
of	O
music	O
or	O
any	O
other	O
recording	O
on	O
a	O
digital	O
audio	O
track	O
.	O
</s>
<s>
If	O
the	O
audio	O
is	O
a	O
speech	O
or	O
an	O
interview	O
then	O
the	O
moodbar	B-Application
displays	O
different	O
speaking	O
segments	O
in	O
unique	O
colour	O
combinations	O
.	O
</s>
<s>
Moodbar	B-Application
was	O
originally	O
presented	O
by	O
Gavin	O
Wood	O
and	O
Simon	O
O’Keefe	O
in	O
their	O
paper	O
On	O
Techniques	O
for	O
Content-Based	O
Visual	O
Annotation	O
to	O
Aid	O
Intra-Track	O
Music	O
Navigation	O
.	O
</s>
<s>
Moodbar	B-Application
has	O
been	O
implemented	O
for	O
Amarok	B-Language
,	O
Clementine	B-Language
,	O
and	O
Exaile	B-Language
music	I-Language
players	I-Language
and	O
the	O
GJay	O
smart	O
playlist	O
creator	O
for	O
Linux	O
.	O
</s>
<s>
As	O
of	O
2008	O
,	O
the	O
default	O
implementation	O
of	O
Amarok	B-Language
's	O
moodbar	B-Application
only	O
uses	O
the	O
spectral	O
content	O
of	O
the	O
current	O
section	O
of	O
the	O
track	O
.	O
</s>
<s>
Each	O
moodbar	B-Application
file	O
is	O
1000	O
samples	O
long	O
,	O
which	O
corresponds	O
to	O
roughly	O
4-5	O
samples	O
every	O
second	O
for	O
a	O
typical	O
3-4	O
minute	O
long	O
song	O
.	O
</s>
