<s>
Hydrogen	O
is	O
an	O
open	B-Application
source	I-Application
drum	O
machine	O
created	O
by	O
Alessandro	O
Cominu	O
,	O
an	O
Italian	O
programmer	O
who	O
goes	O
by	O
the	O
pseudonym	O
Comix	O
.	O
</s>
<s>
Hydrogen	O
was	O
originally	O
developed	O
for	O
Linux	B-Application
,	O
and	O
later	O
ported	O
to	O
Mac	B-Application
OS	I-Application
X	I-Application
.	O
</s>
<s>
Support	O
for	O
Microsoft	B-Application
Windows	I-Application
seemed	O
to	O
have	O
been	O
abandoned	O
,	O
since	O
the	O
last	O
build	O
dated	O
to	O
2006	O
for	O
4	O
years	O
.	O
</s>
<s>
The	O
graphical	B-Application
user	I-Application
interface	I-Application
for	O
the	O
application	O
uses	O
Qt	B-Language
library	I-Language
,	O
and	O
all	O
code	O
is	O
released	O
under	O
GPL-2.0-or-later	B-License
.	O
</s>
<s>
Support	O
for	O
LADSPA	B-Language
effects	O
.	O
</s>
