<s>
D-subminiature	B-Protocol
connectors	I-Protocol
are	O
used	O
to	O
carry	O
balanced	B-Protocol
analog	I-Protocol
or	O
digital	O
audio	O
on	O
many	O
multichannel	O
professional	O
audio	O
equipment	O
,	O
where	O
the	O
use	O
of	O
XLR	O
connectors	O
is	O
impractical	O
,	O
for	O
example	O
due	O
to	O
space	O
constraints	O
.	O
</s>
<s>
The	O
most	O
common	O
usage	O
is	O
the	O
DB25	B-Protocol
,	O
using	O
TASCAM	O
's	O
pinout	O
(	O
now	O
standardised	O
in	O
AES59	O
)	O
.	O
</s>
