<s>
AHI	B-Library
(	O
AHI	B-Library
audio	O
system	O
)	O
is	O
a	O
retargetable	O
audio	O
subsystem	O
for	O
AmigaOS	B-Application
,	O
MorphOS	B-Operating_System
and	O
AROS	B-Application
.	O
</s>
<s>
It	O
was	O
created	O
by	O
Martin	O
Blom	O
in	O
the	O
mid-1990s	O
to	O
allow	O
standardized	O
operating	B-General_Concept
system	I-General_Concept
support	O
for	O
audio	O
hardware	O
other	O
than	O
just	O
the	O
native	O
Amiga	B-Device
sound	O
chip	O
,	O
for	O
example	O
16-bit	B-Device
sound	B-Device
cards	I-Device
.	O
</s>
<s>
AHI	B-Library
offers	O
improved	O
functionality	O
not	O
available	O
through	O
the	O
AmigaOS	B-Application
audio	O
device	B-Application
driver	I-Application
,	O
such	O
as	O
seamless	O
audio	O
playback	O
from	O
a	O
user	O
selected	O
audio	O
device	O
(	O
in	O
applications	O
which	O
supported	O
AHI	B-Library
)	O
,	O
standardized	O
functionality	O
for	O
audio	O
recording	O
and	O
efficient	O
software	O
mixing	O
routines	O
for	O
combining	O
multiple	O
sound	O
channels	O
thus	O
overcoming	O
the	O
four	O
channel	O
hardware	O
limit	O
of	O
the	O
original	O
Amiga	B-Device
chipset	O
.	O
</s>
<s>
It	O
also	O
incorporated	O
a	O
unique	O
mode	O
that	O
produced	O
14-bit	O
playback	O
using	O
the	O
Amiga	B-Device
chipset	O
by	O
combining	O
two	O
8-bit	O
channels	O
set	O
at	O
different	O
volumes	O
.	O
</s>
<s>
The	O
first	O
official	O
release	O
of	O
AHI	B-Library
was	O
in	O
1996	O
.	O
</s>
<s>
AHI	B-Library
became	O
a	O
widely	O
supported	O
standard	O
for	O
audio	O
hardware	O
and	O
audio	O
software	O
on	O
Amiga	B-Device
systems	O
and	O
was	O
officially	O
included	O
in	O
later	O
operating	B-General_Concept
system	I-General_Concept
releases	O
.	O
</s>
<s>
The	O
author	O
has	O
stated	O
that	O
when	O
referring	O
to	O
this	O
software	O
the	O
correct	O
term	O
is	O
'	O
AHI	B-Library
audio	O
system	O
 '	O
or	O
just	O
'	O
AHI	B-Library
 '	O
and	O
not	O
'	O
Audio	O
Hardware	O
Interface	O
 '	O
,	O
term	O
sometimes	O
used	O
by	O
the	O
press	O
.	O
</s>
