<s>
Musepack	B-Algorithm
or	O
MPC	B-Algorithm
is	O
an	O
open	B-License
source	I-License
lossy	B-Algorithm
audio	O
codec	O
,	O
specifically	O
optimized	O
for	O
transparent	B-Algorithm
compression	O
of	O
stereo	O
audio	O
at	O
bitrates	O
of	O
160180	O
(	O
manual	O
set	O
allows	O
bitrates	O
up	O
to	O
320	O
)	O
kbit/s	O
.	O
</s>
<s>
Development	O
of	O
MPC	B-Algorithm
was	O
initiated	O
in	O
1997	O
by	O
Andree	O
Buschmann	O
and	O
later	O
assumed	O
by	O
Frank	O
Klemm	O
,	O
and	O
as	O
of	O
2004	O
is	O
maintained	O
by	O
the	O
Musepack	B-Algorithm
Development	O
Team	O
(	O
MDT	O
)	O
with	O
assistance	O
from	O
Buschmann	O
and	O
Klemm	O
.	O
</s>
<s>
Encoders	O
and	O
decoders	O
are	O
available	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
Linux	B-Application
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
and	O
plugins	O
for	O
several	O
third-party	O
media	O
players	O
available	O
from	O
the	O
Musepack	B-Algorithm
website	O
,	O
licensed	O
under	O
the	O
GNU	B-Application
Lesser	I-Application
General	I-Application
Public	I-Application
License	I-Application
(	O
LGPL	B-Application
)	O
or	O
BSD	B-Operating_System
licenses	I-Operating_System
,	O
and	O
an	O
extensive	O
list	O
of	O
programs	O
supporting	O
the	O
format	O
.	O
</s>
<s>
Musepack	B-Algorithm
was	O
developed	O
using	O
the	O
MP2	O
codec	O
as	O
a	O
starting	O
point	O
,	O
but	O
many	O
features	O
have	O
since	O
been	O
added	O
,	O
including	O
:	O
</s>
<s>
Huffman	B-General_Concept
coding	I-General_Concept
(	O
as	O
in	O
MP3	B-Application
and	O
AAC	B-Application
,	O
but	O
more	O
efficient	O
)	O
.	O
</s>
<s>
The	O
psychoacoustic	O
model	O
of	O
MPC	B-Algorithm
is	O
based	O
on	O
MPEG	O
ISO	O
model	O
2	O
,	O
but	O
is	O
extended	O
by	O
CVD	O
(	O
clear	O
voice	O
detection	O
)	O
.	O
</s>
<s>
The	O
quantization	O
algorithm	O
of	O
the	O
MPC	B-Algorithm
encoder	O
performs	O
spectral	O
shaping	O
of	O
the	O
noise	O
,	O
called	O
adaptive	O
noise	O
shaping	O
(	O
ANS	O
)	O
,	O
in	O
order	O
to	O
overcome	O
the	O
low	O
frequency	O
resolution	O
of	O
the	O
polyphase	O
quadrature	O
filter	O
bands	O
.	O
</s>
<s>
MPC	B-Algorithm
uses	O
the	O
APEv2	O
tag	O
metadata	O
container	O
.	O
</s>
<s>
Musepack	B-Algorithm
is	O
mainly	O
optimized	O
for	O
transparent	B-Algorithm
encoding	O
at	O
the	O
"	O
--standard	O
"	O
preset	O
(	O
175-185	O
kbit/s	O
)	O
.	O
</s>
<s>
Nevertheless	O
,	O
various	O
listening	O
tests	O
have	O
been	O
conducted	O
in	O
which	O
Musepack	B-Algorithm
has	O
performed	O
well	O
at	O
both	O
lower	O
and	O
higher	O
bitrates	O
.	O
</s>
<s>
An	O
SV8	O
MPC	B-Algorithm
is	O
a	O
container	O
file	O
for	O
a	O
Musepack	B-Algorithm
stream	O
.	O
</s>
<s>
Chapter	O
editor	O
(	O
mpcchap	O
)	O
included	O
,	O
for	O
embedding	O
chapters	O
into	O
MPC	B-Algorithm
files	O
.	O
</s>
<s>
Despite	O
being	O
optimized	O
for	O
100%	O
transparency	B-Algorithm
at	O
moderately	O
high	O
bitrates	O
,	O
MPC	B-Algorithm
has	O
also	O
scored	O
highly	O
on	O
many	O
128	O
kbit/s	O
tests	O
.	O
</s>
<s>
In	O
May	O
2004	O
,	O
a	O
series	O
of	O
double-blind	O
listening	O
tests	O
(	O
as	O
reported	O
on	O
Slashdot	O
)	O
suggested	O
that	O
Musepack	B-Algorithm
and	O
Ogg	B-Algorithm
Vorbis	I-Algorithm
(	O
which	O
was	O
the	O
1.1	O
"	O
aoTuV	B-Algorithm
"	O
fork	O
at	O
the	O
time	O
)	O
were	O
the	O
two	O
best	O
available	O
codecs	O
for	O
high-quality	O
audio	O
compression	O
at	O
bitrates	O
around	O
128kbit/s	O
,	O
beating	O
MP3	B-Application
,	O
AAC	B-Application
,	O
WMA	B-Application
,	O
and	O
ATRAC	O
.	O
</s>
<s>
Listening	O
tests	O
of	O
MPC	B-Algorithm
:	O
</s>
<s>
MPC	B-Algorithm
and	O
Vorbis	B-Algorithm
tied	O
for	O
first	O
.	O
</s>
<s>
AAC	B-Application
,	O
MPC	B-Algorithm
,	O
Vorbis	B-Algorithm
,	O
and	O
WMA	B-Application
tied	O
for	O
first	O
.	O
</s>
<s>
Devices	O
supporting	O
The	B-Language
Core	I-Language
Pocket	I-Language
Media	I-Language
Player	I-Language
can	O
play	O
MPC	B-Algorithm
.	O
</s>
<s>
This	O
includes	O
devices	O
running	O
Palm	B-Operating_System
OS	I-Operating_System
,	O
Symbian	B-Operating_System
OS	I-Operating_System
,	O
Windows	B-Application
,	O
Windows	B-Operating_System
CE	I-Operating_System
and	O
Windows	B-Operating_System
Mobile	I-Operating_System
(	O
Pocket	B-Device
PC	I-Device
)	O
.	O
</s>
<s>
All	O
devices	O
with	O
software	O
audio	O
decoding	O
that	O
are	O
supported	O
by	O
Rockbox	B-Application
,	O
including	O
older	O
revisions	O
of	O
iPod	B-Device
,	O
can	O
also	O
play	O
Musepack	B-Algorithm
files	O
.	O
</s>
<s>
There	O
is	O
a	O
plethora	O
of	O
media	O
players	O
for	O
Android	O
supporting	O
Musepack	B-Algorithm
(	O
among	O
them	O
is	O
the	O
ported	O
Rockbox	B-Application
media	O
player	O
)	O
.	O
</s>
<s>
Musepack	B-Algorithm
distributes	O
the	O
libmpcdec	O
library	O
for	O
decoding	O
MPC	B-Algorithm
content	O
.	O
</s>
<s>
Various	O
plugins	O
have	O
been	O
developed	O
,	O
using	O
that	O
library	O
,	O
including	O
for	O
the	O
XMMS	B-Language
player	O
(	O
on	O
Unix	B-Application
)	O
.	O
</s>
<s>
Asunder	B-Language
and	O
Jack	O
!	O
</s>
<s>
The	O
Knife	O
allows	O
ripping	O
Audio	O
CD	O
tracks	O
directly	O
into	O
Musepack	B-Algorithm
files	O
.	O
</s>
