<s>
Asao	B-Algorithm
(	O
also	O
known	O
as	O
Nellymoser	B-Algorithm
audio	O
codec	B-General_Concept
)	O
is	O
a	O
proprietary	O
single-channel	O
(	O
mono	O
)	O
codec	B-General_Concept
and	O
compression	O
format	O
optimized	O
for	O
low-bitrate	O
transmission	O
of	O
audio	O
,	O
developed	O
by	O
Nellymoser	B-Algorithm
Inc	I-Algorithm
.	I-Algorithm
</s>
<s>
This	O
codec	B-General_Concept
does	O
not	O
take	O
into	O
consideration	O
actual	O
sample	O
rate	O
,	O
and	O
has	O
fixed	O
ratio	O
between	O
input	O
samples	O
amount	O
and	O
output	O
packet	O
size	O
(	O
2	O
bits	O
per	O
input	O
sample	O
)	O
.	O
</s>
<s>
On	O
March	O
4	O
,	O
2002	O
Nellymoser	B-Algorithm
Inc	I-Algorithm
.	I-Algorithm
announced	O
that	O
Macromedia	O
licensed	O
Nellymoser	B-Algorithm
's	O
Asao	B-Algorithm
speech	O
and	O
audio	O
compression	O
software	O
to	O
be	O
part	O
of	O
FlashMX	B-Operating_System
and	O
Macromedia	B-Operating_System
Flash	I-Operating_System
Player	I-Operating_System
6	O
.	O
</s>
<s>
The	O
Nellymoser	B-Algorithm
Asao	I-Algorithm
codec	I-Algorithm
is	O
an	O
integral	O
part	O
of	O
the	O
Flash-plugin	O
since	O
Flash	O
version	O
6	O
,	O
released	O
in	O
2003	O
.	O
</s>
<s>
The	O
codec	B-General_Concept
is	O
optimized	O
for	O
real-time	O
and	O
low-latency	O
encoding	O
of	O
audio	O
.	O
</s>
<s>
Flash	B-Operating_System
Player	I-Operating_System
clients	O
,	O
when	O
recording	O
audio	O
from	O
a	O
user	O
's	O
microphone	O
,	O
can	O
use	O
the	O
Nellymoser	B-Algorithm
Asao	I-Algorithm
codec	I-Algorithm
.	O
</s>
<s>
(	O
Flash	B-Operating_System
Player	I-Operating_System
10	O
released	O
in	O
2008	O
also	O
supports	O
the	O
open	B-License
source	I-License
Speex	B-Application
codec	B-General_Concept
.	O
)	O
</s>
<s>
Encoding	O
is	O
done	O
on	O
the	O
client	O
host	O
,	O
and	O
compressed	O
data	O
is	O
then	O
sent	O
using	O
Adobe	O
's	O
RTMP	B-Operating_System
protocol	O
to	O
an	O
RTMP	B-Operating_System
server	O
(	O
Flash	B-Operating_System
Media	I-Operating_System
Server	I-Operating_System
,	O
Wowza	B-Application
Media	I-Application
Server	I-Application
)	O
.	O
</s>
<s>
At	O
the	O
time	O
of	O
the	O
release	O
of	O
Flash	B-Operating_System
Player	I-Operating_System
6	O
in	O
2003	O
,	O
there	O
was	O
no	O
free	O
or	O
open	B-License
source	I-License
software	O
for	O
encoding	O
and	O
decoding	O
Nellymoser	B-Algorithm
audio	O
.	O
</s>
<s>
Nellymoser	B-Algorithm
Inc	I-Algorithm
.	I-Algorithm
sold	O
a	O
decoder	O
for	O
thousands	O
of	O
US	O
dollars	O
.	O
</s>
<s>
In	O
March	O
2006	O
,	O
Adobe	O
Systems	O
 '	O
people	O
posted	O
to	O
Flash	O
Server	O
development	O
newsgroup	O
information	O
about	O
an	O
on-coming	O
new	O
tool	O
for	O
FLV	O
audio	O
(	O
including	O
Nellymoser	B-Algorithm
audio	O
)	O
conversion	O
to	O
MP3/WAV	O
.	O
</s>
<s>
In	O
July	O
2006	O
,	O
they	O
announced	O
that	O
they	O
have	O
not	O
been	O
able	O
to	O
release	O
the	O
FLV/MP3	O
converter	O
due	O
to	O
restrictions	O
in	O
Nellymoser	B-Algorithm
license	O
agreement	O
.	O
</s>
<s>
They	O
found	O
that	O
they	O
can	O
only	O
distribute	O
this	O
tool	O
to	O
be	O
used	O
with	O
licensed	O
copies	O
of	O
Flash	B-Operating_System
Media	I-Operating_System
Server	I-Operating_System
.	O
</s>
<s>
There	O
were	O
also	O
some	O
other	O
attempts	O
for	O
creating	O
free	O
Nellymoser	B-Algorithm
decoder	O
.	O
</s>
<s>
1:4	O
ratio	O
)	O
,	O
which	O
redirects	O
and	O
grabs	O
the	O
audio	O
output	O
(	O
wave	O
)	O
and	O
then	O
encodes	O
it	O
to	O
MP3	B-Application
.	O
</s>
<s>
This	O
method	O
does	O
not	O
use	O
a	O
licensed	O
Nellymoser	B-Algorithm
codec	B-General_Concept
.	O
</s>
<s>
In	O
September	O
2007	O
,	O
a	O
patch	O
based	O
on	O
"	O
nelly2pcm	O
"	O
was	O
sent	O
to	O
FFmpeg	B-Library
multimedia	B-Library
framework	I-Library
development	O
mailinglist	O
.	O
</s>
<s>
In	O
October	O
2007	O
,	O
a	O
patch	O
for	O
decoding	O
Nellymoser	B-Algorithm
audio	O
was	O
added	O
to	O
FFmpeg	B-Library
SVN	B-Application
.	O
</s>
<s>
As	O
of	O
December	O
3	O
,	O
2008	O
,	O
the	O
open	B-License
source	I-License
FFmpeg	B-Library
project	O
has	O
encoding	O
and	O
decoding	O
support	O
for	O
the	O
Nellymoser	B-Algorithm
Asao	I-Algorithm
codec	I-Algorithm
.	O
</s>
<s>
Stable	O
release	O
with	O
Nellymoser	B-Algorithm
audio	O
support	O
is	O
0.5	O
,	O
released	O
on	O
March	O
10	O
,	O
2009	O
.	O
</s>
