<s>
Impulse	B-Application
Tracker	I-Application
is	O
a	O
multi-track	O
music	B-Application
tracker	I-Application
(	O
music	O
sequencer	O
)	O
.	O
</s>
<s>
Originally	O
released	O
in	O
1995	O
by	O
Jeffrey	O
Lim	O
as	O
freeware	B-License
with	O
commercial	O
extensions	O
,	O
it	O
was	O
one	O
of	O
the	O
last	O
tracker	B-Application
programs	O
for	O
the	O
DOS	B-Device
platform	O
.	O
</s>
<s>
In	O
2014	O
,	O
on	O
its	O
20th	O
anniversary	O
,	O
Impulse	B-Application
Tracker	I-Application
became	O
open-source	B-Application
software	I-Application
and	O
the	O
source	O
code	O
was	O
released	O
.	O
</s>
<s>
Impulse	B-Application
Tracker	I-Application
was	O
authored	O
by	O
Jeffrey	O
"	O
Pulse	O
"	O
Lim	O
for	O
the	O
DOS/x86	O
-PC	O
platform	O
.	O
</s>
<s>
Impulse	B-Application
Tracker	I-Application
was	O
coded	O
in	O
Assembly	B-Language
language	I-Language
,	O
and	O
the	O
GUI	B-Application
was	O
heavily	O
influenced	O
by	O
that	O
of	O
Scream	B-Application
Tracker	I-Application
3	I-Application
.	O
</s>
<s>
The	O
software	O
was	O
distributed	O
as	O
freeware	B-License
,	O
though	O
extra	O
features	O
,	O
such	O
as	O
support	O
for	O
stereo	O
WAV	O
output	O
and	O
a	O
personalized	O
version	O
of	O
the	O
driver	O
for	O
co-editing	O
songs	O
over	O
IPX	B-Protocol
networks	O
,	O
were	O
provided	O
for	O
a	O
fee	O
.	O
</s>
<s>
On	O
February	O
16	O
,	O
2014	O
,	O
Jeffrey	O
Lim	O
announced	O
that	O
he	O
would	O
release	O
the	O
complete	O
source	O
code	O
of	O
Impulse	B-Application
Tracker	I-Application
as	O
part	O
of	O
its	O
20-year	O
anniversary	O
.	O
</s>
<s>
On	O
October	O
19	O
,	O
2014	O
,	O
the	O
first	O
part	O
of	O
the	O
source	O
code	O
was	O
released	O
on	O
a	O
Bitbucket	B-Protocol
repository	O
.	O
</s>
<s>
On	O
December	O
25	O
,	O
2014	O
,	O
the	O
missing	O
parts	O
(	O
sound	O
drivers	O
)	O
were	O
added	O
and	O
the	O
code	O
was	O
officially	O
released	O
under	O
the	O
BSD	B-Operating_System
license	I-Operating_System
.	O
</s>
<s>
Impulse	B-Application
Tracker	I-Application
modules	O
use	O
the	O
.IT	O
file	O
extension	O
.	O
</s>
<s>
Impulse	B-Application
Tracker	I-Application
supports	O
hardware	O
MIDI	O
channels	O
on	O
the	O
Gravis	B-Application
Ultrasound	I-Application
,	O
InterWave	O
and	O
Sound	B-Device
Blaster	I-Device
32	I-Device
card	O
families	O
(	O
provided	O
enough	O
RAM	B-Architecture
is	O
available	O
)	O
.	O
</s>
<s>
The	O
.IT	O
file	O
format	O
is	O
the	O
format	O
native	O
to	O
Impulse	B-Application
Tracker	I-Application
.	O
</s>
<s>
There	O
is	O
also	O
the	O
.ITZ	O
format	O
,	O
which	O
is	O
a	O
renamed	O
zip	B-General_Concept
file	I-General_Concept
that	O
contains	O
a	O
.IT	O
file	O
.	O
</s>
<s>
Other	O
music-playing	O
software	O
that	O
supports	O
the	O
IT	O
file	O
format	O
include	O
Cowon	B-Application
jetAudio	I-Application
,	O
Windows	O
Media	O
Player*¹	O
,	O
MikMod	O
,	O
ModPlug	B-Language
Tracker	I-Language
,	O
OpenMPT	B-Language
,	O
Renoise	B-Application
,	O
Schism	O
Tracker	B-Application
,	O
ChibiTracker	O
,	O
XMPlay	O
,	O
TiMidity	B-Language
,	O
VLC	B-Application
,	O
Winamp	B-Application
,	O
and	O
XMMS	B-Language
.	O
</s>
<s>
*¹	O
-	O
Supported	O
only	O
on	O
x86(32bit )	O
versions	O
.	O
</s>
<s>
Erez	O
Eizen	O
of	O
Infected	O
Mushroom	O
and	O
Shiva	O
Shidapu	O
composed	O
his	O
first	O
trance	O
music	O
on	O
Impulse	B-Application
Tracker	I-Application
.	O
</s>
<s>
Ian	O
Stocker	O
used	O
IT	O
with	O
other	O
software	O
in	O
his	O
collaboration	O
for	O
the	O
music	O
in	O
the	O
Nintendo	O
DS	O
version	O
of	O
The	B-Application
Sims	I-Application
2	I-Application
.	O
</s>
<s>
The	O
video	O
games	O
Pocket	B-Application
Tanks	I-Application
and	O
Grid	B-Application
Wars	I-Application
use	O
the	O
IT	O
format	O
for	O
some	O
of	O
their	O
songs	O
.	O
</s>
<s>
Various	O
games	O
by	O
Epic	O
Games	O
such	O
as	O
the	O
first	O
Unreal	B-Application
and	O
Unreal	B-Operating_System
Tournament	I-Operating_System
as	O
well	O
as	O
Deus	B-Application
Ex	I-Application
used	O
the	O
IT	O
format	O
in	O
a	O
"	O
UMX	O
"	O
container	O
format	O
.	O
</s>
<s>
The	O
video	O
game	O
composer	O
and	O
demoscener	O
Andrew	O
Sega	O
(	O
Necros	O
)	O
used	O
Impulse	B-Application
Tracker	I-Application
extensively	O
in	O
his	O
demoscene	O
days	O
.	O
</s>
<s>
C418	O
began	O
making	O
music	O
in	O
Impulse	B-Application
Tracker	I-Application
,	O
before	O
moving	O
to	O
eJay	B-Application
,	O
MTV	O
Music	O
Generator	O
and	O
eventually	O
Ableton	B-Language
Live	I-Language
,	O
which	O
he	O
used	O
to	O
compose	O
the	O
Minecraft	O
soundtrack	O
.	O
</s>
<s>
Trance	O
producer	O
Sean	O
Tyas	O
began	O
his	O
music	O
production	O
career	O
using	O
Impulse	B-Application
Tracker	I-Application
.	O
</s>
<s>
Electronic	O
rock	O
musician	O
Blue	O
Stahli	O
has	O
revealed	O
to	O
have	O
used	O
Impulse	B-Application
Tracker	I-Application
and	O
other	O
trackers	B-Application
in	O
the	O
past	O
.	O
</s>
<s>
Deadmau5	O
's	O
career	O
began	O
in	O
the	O
mid	O
1990s	O
with	O
a	O
chiptune	O
and	O
demoscene	O
movements-influenced	O
sound	O
with	O
Impulse	B-Application
Tracker	I-Application
.	O
</s>
<s>
Machinedrum	O
used	O
Impulse	B-Application
Tracker	I-Application
for	O
many	O
years	O
before	O
switching	O
to	O
Ableton	B-Language
Live	I-Language
.	O
</s>
