<s>
Qtractor	B-Language
is	O
a	O
hard	O
disk	O
recorder	O
and	O
digital	B-General_Concept
audio	I-General_Concept
workstation	I-General_Concept
application	O
for	O
Linux	B-Application
.	O
</s>
<s>
Qtractor	B-Language
is	O
written	O
in	O
C++	B-Language
and	O
is	O
based	O
on	O
the	O
Qt	B-Language
framework	I-Language
.	O
</s>
<s>
Its	O
author	O
is	O
Rui	O
Nuno	O
Capela	O
,	O
who	O
is	O
also	O
responsible	O
for	O
the	O
Qjackctl	O
,	O
Qsynth	B-Application
and	O
Qsampler	O
line	O
of	O
Linux	B-Application
audio	I-Application
software	I-Application
.	O
</s>
<s>
Qtractor	B-Language
's	O
intention	O
was	O
to	O
provide	O
digital	B-General_Concept
audio	I-General_Concept
workstation	I-General_Concept
software	O
simple	O
enough	O
for	O
the	O
average	O
home	O
user	O
,	O
and	O
yet	O
powerful	O
enough	O
for	O
the	O
professional	O
user	O
.	O
</s>
<s>
Released	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
,	O
Qtractor	B-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
software	I-License
application	O
.	O
</s>
<s>
Qtractor	B-Language
is	O
a	O
non-destructive	O
digital	O
audio	O
and	O
MIDI	O
multi-track	O
composition	O
sequencer	O
and	O
arranger	O
software	O
application	O
.	O
</s>
<s>
Qtractor	B-Language
was	O
simply	O
the	O
hobby	O
project	O
of	O
one	O
developer	O
.	O
</s>
<s>
Since	O
October	O
2006	O
,	O
it	O
is	O
officially	O
a	O
Qt4	B-Language
application	O
.	O
</s>
<s>
Qtractor	B-Language
is	O
natively	O
hardwired	O
and	O
exclusive	O
to	O
the	O
JACK	B-Application
Audio	I-Application
Connection	I-Application
Kit	I-Application
infrastructure	O
,	O
and	O
the	O
ALSA	B-Application
sequencer	O
for	O
MIDI	O
.	O
</s>
<s>
It	O
is	O
a	O
Linux-only	O
application	O
.	O
</s>
<s>
Supports	O
multiple	O
audio	O
file	O
formats	O
,	O
both	O
compressed	O
and	O
uncompressed	O
,	O
including	O
older	O
formats	O
such	O
as	O
8SVX	B-Operating_System
and	O
.iff	B-Operating_System
.	O
</s>
<s>
Supports	O
most	O
major	O
audio	O
and	O
MIDI	O
file	O
formats	O
and	O
most	O
Linux	B-Application
plugin	O
technologies	O
.	O
</s>
<s>
Qtractor	B-Language
may	O
be	O
used	O
in	O
an	O
audio	O
mastering	O
environment	O
.	O
</s>
<s>
Its	O
integration	O
with	O
JACK	B-Application
makes	O
it	O
possible	O
to	O
use	O
mastering	O
tools	O
such	O
as	O
JAMin	O
to	O
process	O
the	O
audio	O
data	O
.	O
</s>
<s>
Qtractor	B-Language
has	O
both	O
an	O
audio	O
and	O
MIDI	O
metronome	O
with	O
user	O
selectable	O
audio	O
samples	O
.	O
</s>
<s>
Supports	O
LADSPA	B-Language
,	O
DSSI	B-Application
(	O
this	O
includes	O
DSSI-VST	O
wrapper	O
)	O
,	O
native	O
Linux	B-Application
VST	B-Application
(	O
version	O
2	O
and	O
3	O
)	O
,	O
CLAP	O
and	O
LV2	B-Application
plugins	O
.	O
</s>
<s>
Qtractor	B-Language
relies	O
on	O
plugins	O
to	O
enable	O
many	O
features	O
from	O
audio	B-Algorithm
effects	I-Algorithm
processing	O
to	O
dynamic	O
control	O
.	O
</s>
<s>
Qtractor	B-Language
supports	O
the	O
LADSPA	B-Language
plugin	O
architecture	O
,	O
as	O
well	O
as	O
DSSI	B-Application
,	O
native	O
Linux	B-Application
VST	B-Application
(	O
versions	O
2	O
and	O
3	O
)	O
,	O
,	O
CLAP	O
and	O
LV2	B-Application
.	O
</s>
<s>
Support	O
for	O
Steinberg	O
's	O
VST	B-Application
plugin	I-Application
standard	O
with	O
Wine	B-Application
is	O
available	O
using	O
the	O
DSSI-VST	O
wrapper	O
.	O
</s>
<s>
Qtractor	B-Language
stores	O
these	O
connections	O
,	O
and	O
re-establishes	O
them	O
when	O
a	O
project	O
is	O
reloaded	O
.	O
</s>
