<s>
XAudio2	B-Device
is	O
a	O
lower-level	O
audio	O
API	B-Application
for	O
Microsoft	B-Application
Windows	I-Application
,	O
Xbox	B-Operating_System
360	I-Operating_System
and	O
Windows	O
Phone	O
8	O
,	O
the	O
successor	O
to	O
DirectSound	B-Device
on	O
Windows	O
and	O
a	O
supplement	O
to	O
the	O
original	O
XAudio	O
on	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
.	O
</s>
<s>
XAudio2	B-Device
operates	O
through	O
the	O
XAudio	O
API	B-Application
on	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
,	O
through	O
DirectSound	B-Device
on	O
Windows	B-Application
XP	I-Application
,	O
and	O
through	O
the	O
low-level	O
audio	O
mixer	O
WASAPI	O
on	O
Windows	B-Application
Vista	I-Application
and	O
higher	O
.	O
</s>
<s>
The	O
RTM	O
release	O
of	O
the	O
XAudio2	B-Device
library	B-Library
is	O
included	O
in	O
the	O
March	O
2008	O
DirectX	O
SDK	B-Application
,	O
enabling	O
a	O
programmer	O
with	O
Visual	B-Application
Studio	I-Application
to	O
use	O
XAudio2	B-Device
in	O
a	O
Windows	O
,	O
Xbox	B-Operating_System
360	I-Operating_System
and	O
Windows	O
Phone	O
8	O
project	O
.	O
</s>
<s>
The	O
latest	O
version	O
of	O
XAudio2	B-Device
is	O
2.9	O
,	O
released	O
for	O
Windows	B-Operating_System
10	I-Operating_System
.	O
</s>
<s>
XAudio2	B-Device
versions	O
have	O
shipped	O
for	O
use	O
on	O
Xbox	B-Operating_System
360	I-Operating_System
and	O
versions	O
of	O
Windows	O
,	O
and	O
for	O
as	O
old	O
as	O
Windows	B-Application
XP	I-Application
using	O
redistributable	O
DLLs	O
,	O
with	O
newer	O
versions	O
adding	O
features	O
only	O
compatible	O
with	O
newer	O
operating	O
systems	O
.	O
</s>
<s>
There	O
are	O
known	O
issues	O
with	O
XAudio2	B-Device
2.7	O
library	B-Library
that	O
is	O
"	O
in	O
the	O
legacy	O
DirectX	O
SDK	B-Application
"	O
.	O
</s>
<s>
"	O
XAudio2	B-Device
:	O
High	O
Performance	O
Considerations	O
"	O
(	O
talk	O
)	O
supports	O
Windows	O
7	O
.	O
</s>
<s>
XAudio2	B-Device
provides	O
mixing	O
and	O
signal	B-Algorithm
processing	I-Algorithm
for	O
high-level	O
audio	O
APIs	B-Application
such	O
as	O
XACT	B-Library
and	O
as	O
well	O
provides	O
the	O
programmer	O
with	O
high-level	O
functions	O
related	O
to	O
spatial	B-Application
processing	I-Application
.	O
</s>
<s>
XAudio2	B-Device
abstracts	B-Application
audio	O
generation	O
by	O
separating	O
sound	O
data	O
from	O
"	O
voice	O
"	O
,	O
allowing	O
each	O
voice	O
to	O
be	O
filtered	O
by	O
programmable	O
digital	B-General_Concept
signal	I-General_Concept
processing	I-General_Concept
and	O
effects	O
processing	O
functions	O
.	O
</s>
<s>
XAudio2	B-Device
can	O
natively	O
decompress	O
XMA	B-Application
on	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
,	O
xWMA	B-Application
on	O
Windows	B-Operating_System
10	I-Operating_System
,	O
and	O
various	O
ADPCM	B-Algorithm
codecs	O
on	O
both	O
platforms	O
.	O
</s>
<s>
XAudio2	B-Device
2.8	O
supports	O
Windows	O
Store	O
App	O
development	O
and	O
can	O
be	O
used	O
in	O
C++	O
/DirectX	O
apps	O
.	O
</s>
