<s>
Digital	B-Operating_System
Performer	I-Operating_System
is	O
a	O
digital	B-General_Concept
audio	I-General_Concept
workstation	I-General_Concept
and	O
music	O
sequencer	O
software	O
package	O
published	O
by	O
Mark	O
of	O
the	O
Unicorn	O
(	O
MOTU	O
)	O
of	O
Cambridge	O
,	O
Massachusetts	O
for	O
the	O
Apple	B-Device
Macintosh	I-Device
and	O
Microsoft	B-Application
Windows	I-Application
platforms	O
.	O
</s>
<s>
In	O
1984	O
,	O
Mark	O
of	O
the	O
Unicorn	O
released	O
Professional	O
Composer	O
,	O
one	O
of	O
the	O
first	O
application	O
programs	O
for	O
the	O
Apple	B-Device
Macintosh	I-Device
.	O
</s>
<s>
The	O
program	O
used	O
the	O
Macintosh	B-Device
's	O
high-resolution	O
graphics	O
and	O
printing	O
to	O
allow	O
the	O
user	O
to	O
print	O
professional	O
quality	O
music	O
scores	O
.	O
</s>
<s>
In	O
1985	O
,	O
the	O
company	O
released	O
a	O
music	O
sequencer	O
named	O
Performer	O
,	O
also	O
based	O
on	O
the	O
Macintosh	B-Device
platform	O
,	O
for	O
arranging	O
and	O
performing	O
with	O
synthesizers	O
and	O
other	O
devices	O
which	O
recognized	O
the	O
then-newly	O
developed	O
MIDI	O
standard	O
.	O
</s>
<s>
There	O
are	O
many	O
deep	O
features	O
in	O
the	O
MIDI	O
protocol	O
;	O
MOTU	O
developed	O
extended	O
capabilities	O
in	O
Digital	B-Operating_System
Performer	I-Operating_System
for	O
handling	O
these	O
controllers	O
and	O
other	O
actions	O
(	O
including	O
remote	O
operation	O
of	O
the	O
software	O
itself	O
)	O
through	O
user-customizable	O
graphical	O
consoles	O
,	O
allowing	O
the	O
operator	O
direct	O
access	O
to	O
deeper	O
features	O
of	O
instruments	O
,	O
stage	O
lighting	O
and	O
various	O
types	O
of	O
machines	O
,	O
all	O
via	O
MIDI	O
interfaces	O
and	O
custom	O
graphic	O
buttons	O
and	O
sliders	O
.	O
</s>
<s>
In	O
1990	O
,	O
MOTU	O
added	O
the	O
ability	O
to	O
synchronise	O
audio	O
(	O
digital	O
audio	O
)	O
to	O
Performer	O
and	O
released	O
it	O
as	O
"	O
Digital	B-Operating_System
Performer	I-Operating_System
,	O
"	O
months	O
after	O
Opcode	O
added	O
this	O
capability	O
to	O
Vision	O
.	O
</s>
<s>
Digital	B-Operating_System
Performer	I-Operating_System
was	O
originally	O
designed	O
as	O
a	O
front-end	O
to	O
Digidesign	O
's	O
Audiomedia	O
hard	O
disk	O
recording	O
system	O
,	O
which	O
later	O
became	O
Pro	B-Application
Tools	I-Application
.	O
</s>
<s>
Digital	B-Operating_System
Performer	I-Operating_System
's	O
specific	O
appeal	O
was	O
its	O
MIDI	O
environment	O
,	O
which	O
was	O
fitted	O
into	O
the	O
same	O
transport	O
system	O
as	O
the	O
audio	O
environment	O
.	O
</s>
<s>
Personal	B-Device
computers	I-Device
of	O
this	O
time	O
were	O
too	O
slow	O
to	O
handle	O
high	O
quality	O
recording	O
via	O
their	O
own	O
CPU	O
,	O
so	O
the	O
addition	O
of	O
Digital	B-General_Concept
signal	I-General_Concept
processing	I-General_Concept
co-processor	B-General_Concept
cards	O
was	O
necessary	O
to	O
create	O
a	O
functioning	O
audio	O
recording	O
studio	O
.	O
</s>
<s>
As	O
the	O
Mac	B-Device
's	O
CPU	O
became	O
powerful	O
enough	O
to	O
record	O
the	O
digitized	O
audio	O
directly	O
to	O
hard	O
disk	O
,	O
the	O
DSP	O
cards	O
were	O
gradually	O
rendered	O
unnecessary	O
.	O
</s>
<s>
Foreseeing	O
this	O
,	O
MOTU	O
created	O
its	O
own	O
Motu	B-Operating_System
Audio	I-Operating_System
System	I-Operating_System
(	O
MAS	O
)	O
which	O
helped	O
Digital	B-Operating_System
Performer	I-Operating_System
to	O
tap	O
the	O
Macintosh	B-Device
's	O
native	O
power	O
to	O
record	O
music	O
directly	O
to	O
its	O
own	O
hard	O
drive	O
without	O
the	O
need	O
for	O
external	O
co-processing	O
and	O
dedicated	O
drives	O
.	O
</s>
<s>
By	O
2000	O
,	O
Digital	B-Operating_System
Performer	I-Operating_System
allowed	O
users	O
to	O
record	O
,	O
mix	O
,	O
and	O
master	O
audio	O
for	O
commercial	O
releases	O
.	O
</s>
<s>
Version	O
3	O
of	O
Digital	B-Operating_System
Performer	I-Operating_System
was	O
the	O
last	O
to	O
run	O
on	O
Mac	B-Operating_System
OS	I-Operating_System
9	I-Operating_System
,	O
the	O
Classic	O
Macintosh	B-Device
operating	O
system	O
.	O
</s>
<s>
After	O
a	O
complete	O
rewrite	O
,	O
MOTU	O
released	O
Digital	O
Performer	O
4.0	O
in	O
May	O
2003	O
,	O
which	O
ran	O
exclusively	O
on	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
.	O
</s>
<s>
Beginning	O
with	O
version	O
4.5	O
,	O
MOTU	O
introduced	O
a	O
number	O
of	O
important	O
new	O
features	O
to	O
Digital	B-Operating_System
Performer	I-Operating_System
.	O
</s>
<s>
The	O
software	O
was	O
updated	O
to	O
version	O
5.13	O
on	O
19	O
November	O
2007	O
to	O
provide	O
compatibility	O
with	O
Mac	B-Application
OS	I-Application
X	I-Application
v10.5	I-Application
.	O
</s>
<s>
and	O
available	O
in	O
Universal	B-Operating_System
Binary	I-Operating_System
.	O
</s>
<s>
Digital	B-Operating_System
Performer	I-Operating_System
remains	O
one	O
of	O
the	O
popular	O
audio	O
workstations	O
on	O
the	O
Macintosh	B-Device
.	O
</s>
<s>
Chief	O
among	O
its	O
competition	O
on	O
the	O
Macintosh	B-Device
platform	O
are	O
Pro	B-Application
Tools	I-Application
and	O
Apple	O
's	O
Logic	B-Application
.	O
</s>
<s>
In	O
October	O
2012	O
,	O
MOTU	O
released	O
Digital	B-Operating_System
Performer	I-Operating_System
8	O
for	O
OSX	B-Operating_System
.	O
</s>
<s>
Digital	B-Operating_System
Performer	I-Operating_System
8	O
is	O
available	O
on	O
Windows	O
as	O
well	O
.	O
</s>
<s>
Version	O
9	O
of	O
Digital	B-Operating_System
Performer	I-Operating_System
was	O
released	O
in	O
June	O
2015	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
and	O
Windows	O
.	O
</s>
<s>
Version	O
10	O
of	O
Digital	B-Operating_System
Performer	I-Operating_System
was	O
released	O
in	O
February	O
2019	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
and	O
Windows	O
.	O
</s>
<s>
AudioDesk	O
is	O
a	O
more	O
basic	O
version	O
of	O
MOTU	O
's	O
Digital	B-Operating_System
Performer	I-Operating_System
for	O
mac	B-Device
only	O
.	O
</s>
<s>
Much	O
of	O
the	O
graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
and	O
its	O
operation	O
are	O
similar	O
to	O
Digital	B-Operating_System
Performer	I-Operating_System
,	O
although	O
it	O
lacks	O
some	O
of	O
Digital	B-Operating_System
Performer	I-Operating_System
's	O
features	O
.	O
</s>
<s>
Most	O
notably	O
,	O
it	O
does	O
not	O
include	O
MIDI	O
sequencing	O
capabilities	O
,	O
and	O
thus	O
does	O
not	O
include	O
some	O
of	O
Digital	B-Operating_System
Performer	I-Operating_System
's	O
MIDI-specific	O
editing	O
windows	O
.	O
</s>
<s>
Also	O
,	O
AudioDesk	O
is	O
only	O
available	O
as	O
a	O
bundled	O
application	O
with	O
MOTU	O
audio	O
interfaces	O
;	O
this	O
also	O
means	O
that	O
AudioDesk	O
requires	O
a	O
MOTU	O
audio	O
interface	O
to	O
be	O
used	O
as	O
its	O
soundcard	B-Device
.	O
</s>
<s>
Version	O
1	O
is	O
compatible	O
with	O
the	O
Classic	B-Application
Mac	I-Application
OS	I-Application
.	O
</s>
<s>
Version	O
2	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
was	O
released	O
in	O
2003	O
,	O
with	O
numerous	O
updates	O
(	O
many	O
of	O
which	O
corresponded	O
to	O
updates	O
from	O
Digital	B-Operating_System
Performer	I-Operating_System
3	O
for	O
the	O
Classic	B-Application
Mac	I-Application
OS	I-Application
to	O
Digital	B-Operating_System
Performer	I-Operating_System
4	I-Operating_System
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
)	O
.	O
</s>
