<s>
EMMS	B-Operating_System
(	O
Emacs	B-Operating_System
MultiMedia	I-Operating_System
System	I-Operating_System
)	O
is	O
media	O
player	O
software	O
for	O
Emacs	B-Application
.	O
</s>
<s>
It	O
is	O
written	O
in	O
Emacs	B-Operating_System
Lisp	I-Operating_System
.	O
</s>
<s>
The	O
name	O
could	O
possibly	O
echo	O
XMMS	B-Language
.	O
</s>
<s>
It	O
may	O
be	O
derived	O
from	O
an	O
earlier	O
Emacs-based	O
player	O
called	O
mp3-player	O
.	O
</s>
<s>
EMMS	B-Operating_System
may	O
have	O
multiple	O
back	O
ends	O
to	O
connect	O
to	O
external	O
players	O
so	O
EMMS	B-Operating_System
can	O
support	O
a	O
few	O
different	O
audio	O
and	O
video	O
formats	O
,	O
while	O
remaining	O
clean	O
and	O
small	O
itself	O
.	O
</s>
<s>
EMMS	B-Operating_System
is	O
divided	O
into	O
three	O
parts	O
,	O
the	O
player	O
back	O
ends	O
,	O
media	O
sources	O
(	O
which	O
can	O
be	O
a	O
local	O
file	O
system	O
or	O
a	O
network	O
stream	O
)	O
,	O
and	O
the	O
core	O
player	O
.	O
</s>
<s>
One	O
of	O
the	O
player	O
back	O
ends	O
connects	O
to	O
MPD	B-Language
.	O
</s>
<s>
Other	O
backends	O
are	O
available	O
for	O
mplayer	B-Application
and	O
gstreamer	B-Language
.	O
</s>
<s>
EMMS	B-Operating_System
implements	O
a	O
buffer-based	O
playlist	O
and	O
queue	O
.	O
</s>
<s>
Standard	O
Emacs	B-Application
key	O
bindings	O
are	O
used	O
to	O
navigate	O
,	O
edit	O
the	O
playlist	O
,	O
and	O
control	O
playback	O
.	O
</s>
<s>
Using	O
Emacs	B-Application
server	O
support	O
,	O
playlists	O
can	O
be	O
built	O
using	O
a	O
file	B-Application
manager	I-Application
such	O
as	O
ROX-Filer	B-Language
.	O
</s>
<s>
EMMS	B-Operating_System
supported	O
scrobbling	B-Application
to	O
Last.fm	B-Application
until	O
version	O
4.0	O
,	O
when	O
this	O
service	O
was	O
replaced	O
with	O
the	O
free	B-Application
software	I-Application
Libre.fm	B-Protocol
.	O
</s>
<s>
There	O
are	O
many	O
third-party	O
scripts	O
to	O
enhance	O
EMMS	B-Operating_System
to	O
provide	O
pop-up	O
notifications	O
,	O
lyric	O
fetching	O
,	O
and	O
binaural	O
beat	O
generation	O
.	O
</s>
