<s>
Disposable	B-Application
Soft	I-Application
Synth	I-Application
Interface	I-Application
(	O
DSSI	O
)	O
is	O
a	O
virtual	O
instrument	O
(	O
software	B-Application
synthesizer	I-Application
)	O
plugin	O
architecture	O
for	O
use	O
by	O
music	O
sequencer	O
applications	O
.	O
</s>
<s>
It	O
was	O
designed	O
for	O
applications	O
running	O
under	O
Linux	B-Application
,	O
although	O
there	O
is	O
nothing	O
specific	O
to	O
Linux	B-Application
in	O
the	O
interface	O
itself	O
.	O
</s>
<s>
It	O
is	O
distributed	O
under	O
the	O
terms	O
of	O
a	O
combination	O
of	O
LGPL-2.1-or-later	B-Application
and	O
some	O
BSD	B-Operating_System
licenses	I-Operating_System
,	O
all	O
of	O
which	O
are	O
free	B-License
software	I-License
licences	I-License
.	O
</s>
<s>
DSSI	O
is	O
sometimes	O
described	O
as	O
Linux	B-Language
Audio	I-Language
Developer	I-Language
's	I-Language
Simple	I-Language
Plugin	I-Language
API	I-Language
(	O
LADSPA	B-Language
)	O
for	O
instruments	O
.	O
</s>
<s>
LADSPA	B-Language
is	O
an	O
audio	O
effects	O
plugin	O
architecture	O
for	O
filters	O
,	O
reverbs	O
and	O
other	O
sound	O
processing	O
software	O
tools	O
,	O
whereas	O
DSSI	O
was	O
designed	O
specifically	O
for	O
instrument	O
plugins	O
that	O
generate	O
sound	O
from	O
note	O
events	O
.	O
</s>
<s>
DSSI	O
extends	O
LADSPA	B-Language
by	O
adding	O
note	O
event	O
delivery	O
,	O
but	O
it	O
also	O
adds	O
predefined	O
program	O
selections	O
and	O
a	O
method	O
for	O
plugins	O
to	O
provide	O
their	O
own	O
user	O
interfaces	O
,	O
both	O
of	O
which	O
may	O
also	O
be	O
used	O
by	O
effects	O
plugins	O
.	O
</s>
<s>
This	O
is	O
partly	O
because	O
DSSI	O
was	O
intended	O
to	O
be	O
a	O
lightweight	O
addition	O
to	O
LADSPA	B-Language
that	O
would	O
require	O
little	O
extra	O
effort	O
from	O
authors	O
of	O
LADSPA	B-Language
hosts	O
and	O
plugins	O
to	O
support	O
,	O
and	O
partly	O
to	O
avoid	O
distracting	O
too	O
much	O
developer	O
effort	O
from	O
the	O
Generalized	B-Architecture
Music	I-Architecture
Plug-in	I-Architecture
Interface	I-Architecture
(	O
GMPI	O
)	O
plug-in	O
initiative	O
(	O
which	O
has	O
since	O
stalled	O
)	O
.	O
</s>
<s>
A	O
successor	O
which	O
reunites	O
the	O
two	O
standards	O
LADSPA	B-Language
and	O
DSSI	O
is	O
LV2	B-Application
.	O
</s>
<s>
DSSI	O
hosts	O
on	O
Linux	B-Application
can	O
also	O
host	O
some	O
Virtual	B-Application
Studio	I-Application
Technology	I-Application
(	O
VST	O
)	O
instruments	O
(	O
VSTi	O
)	O
for	O
Microsoft	B-Application
Windows	I-Application
using	O
the	O
dssi-vst	O
wrapper	O
plug-in	O
,	O
which	O
in	O
turn	O
makes	O
use	O
of	O
the	O
Wine	B-Application
compatibility	I-Application
layer	I-Application
.	O
</s>
<s>
The	O
major	O
programs	O
supporting	O
DSSI	O
are	O
Qtractor	B-Language
,	O
Renoise	B-Application
and	O
Rosegarden	B-Language
.	O
</s>
