<s>
Master	B-Application
Tracks	I-Application
Pro	I-Application
(	O
MTP	O
)	O
is	O
music-sequencer	O
software	O
for	O
Windows	O
,	O
to	O
author	O
and/or	O
edit	O
MIDI	O
data	O
.	O
</s>
<s>
MTP	O
originated	O
in	O
the	O
middle	O
’	O
80s	O
for	O
the	O
Commodore	O
and	O
Apple	B-Device
II	I-Device
machines	O
,	O
and	O
when	O
the	O
Atari	B-Device
ST	I-Device
implemented	O
its	O
MIDI	O
support	O
.	O
</s>
<s>
It	O
has	O
continued	O
to	O
be	O
one	O
of	O
the	O
more	O
popular	O
proprietary	B-Application
sequencers	O
,	O
but	O
has	O
n't	O
seen	O
any	O
major	O
updates	O
since	O
2003	O
(	O
after	O
having	O
been	O
acquired	O
by	O
GVOX	O
)	O
other	O
than	O
6.8.4	O
for	O
Windows	O
,	O
which	O
is	O
reputed	O
to	O
have	O
compatibility	O
issues	O
of	O
its	O
own	O
.	O
</s>
<s>
Passport	O
Music	O
Software	O
,	O
LLC	O
,	O
had	O
announced	O
plans	O
to	O
show	O
MasterTracks	B-Application
Pro	I-Application
7	O
at	O
the	O
2015	O
NAMM	O
show	O
,	O
but	O
as	O
of	O
January	O
2019	O
,	O
the	O
latest	O
version	O
offered	O
on	O
its	O
website	O
was	O
Version	O
6.8.4	O
for	O
Windows	O
.	O
</s>
<s>
It	O
can	O
handle	O
as	O
many	O
as	O
16	O
MIDI	O
interfaces	O
,	O
and	O
supports	O
the	O
MCI	B-Device
on	O
Windows	O
,	O
has	O
remote	O
capabilities	O
,	O
a	O
“	O
big	O
counter	O
”	O
mode	O
for	O
visibility	O
at	O
a	O
distance	O
during	O
performance	O
or	O
recording	O
,	O
and	O
also	O
punch-in	O
and	O
-out	O
capabilities	O
.	O
</s>
<s>
A	O
GUI	B-Application
application	O
,	O
it	O
uses	O
a	O
hierarchy	O
of	O
windows	O
as	O
listed	O
here	O
:	O
</s>
<s>
The	O
Notation	O
window	O
displays	O
a	O
track	O
's	O
MIDI	O
in	O
a	O
WYSIWYG	B-Application
notation	O
format	O
on	O
a	O
two-stave	O
piano	O
tablature	O
using	O
code	O
derived	O
from	O
Passport	O
's	O
notation	O
application	O
Encore	B-Application
(	O
which	O
requires	O
the	O
font	O
Anastasia	O
,	O
provided	O
in	O
TrueType	O
and	O
Type	O
1	O
formats	O
)	O
.	O
</s>
<s>
The	O
Tempo	O
Map	O
window	O
allows	O
fine-scale	O
WYSIWYG	B-Application
graphical	O
editing	O
of	O
this	O
MIDI-file	O
data	O
track	O
,	O
for	O
controlling	O
rubato	O
,	O
accel	O
-	O
and	O
ritardando	O
,	O
etc	O
.	O
</s>
