<s>
LilyPond	B-Application
is	O
a	O
computer	B-Application
program	I-Application
and	O
file	O
format	O
for	O
music	B-Application
engraving	I-Application
.	O
</s>
<s>
One	O
of	O
LilyPond	B-Application
's	O
major	O
goals	O
is	O
to	O
produce	O
scores	O
that	O
are	O
engraved	O
with	O
traditional	O
layout	O
rules	O
,	O
reflecting	O
the	O
era	O
when	O
scores	O
were	O
engraved	O
by	O
hand	O
.	O
</s>
<s>
LilyPond	B-Application
is	O
cross-platform	B-Operating_System
,	O
and	O
is	O
available	O
for	O
several	O
common	O
operating	B-General_Concept
systems	I-General_Concept
;	O
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
LilyPond	B-Application
is	O
free	B-Application
software	I-Application
and	O
part	O
of	O
the	B-Application
GNU	I-Application
Project	I-Application
.	O
</s>
<s>
The	O
LilyPond	B-Application
project	O
was	O
started	O
in	O
1996	O
by	O
Han-Wen	B-Application
Nienhuys	I-Application
and	O
Jan	B-Application
Nieuwenhuizen	I-Application
,	O
after	O
they	O
decided	O
to	O
abandon	O
work	O
on	O
MPP	O
(	O
MusiXTeX	B-Application
PreProcessor	O
)	O
,	O
a	O
project	O
they	O
began	O
collaborating	O
on	O
in	O
1995	O
.	O
</s>
<s>
Its	O
name	O
was	O
inspired	O
both	O
by	O
the	O
Rosegarden	B-Language
project	O
and	O
an	O
acquaintance	O
of	O
Nienhuys	O
and	O
Nieuwenhuizen	O
named	O
Suzanne	O
,	O
a	O
name	O
that	O
means	O
lily	O
in	O
Hebrew	O
(	O
)	O
.	O
</s>
<s>
LilyPond	B-Application
1.0	O
was	O
released	O
on	O
July	O
31	O
,	O
1998	O
,	O
highlighting	O
the	O
development	O
of	O
a	O
custom	O
music	O
font	O
,	O
Feta	O
,	O
and	O
the	O
complete	O
separation	O
of	O
LilyPond	B-Application
from	O
MusiXTeX	B-Application
.	O
</s>
<s>
LilyPond	B-Application
2.0	O
was	O
released	O
on	O
September	O
24	O
,	O
2003	O
,	O
announcing	O
a	O
simplified	O
syntax	O
model	O
and	O
a	O
much	O
more	O
complete	O
set	O
of	O
facilities	O
for	O
notating	O
various	O
styles	O
of	O
music	O
.	O
</s>
<s>
LilyPond	B-Application
is	O
mostly	O
written	O
in	O
C++	B-Language
and	O
uses	O
Scheme	B-Language
(	O
interpreted	O
by	O
GNU	B-Application
Guile	I-Application
)	O
as	O
its	O
extension	O
language	O
,	O
allowing	O
for	O
user	O
customization	O
.	O
</s>
<s>
It	O
has	O
a	O
relatively	O
large	O
codebase	O
;	O
as	O
of	O
March	O
10	O
,	O
2017	O
,	O
the	O
source	O
includes	O
over	O
600,000	O
lines	O
of	O
C++	B-Language
,	O
140,000	O
lines	O
of	O
Scheme	B-Language
,	O
and	O
120,000	O
lines	O
of	O
Python	B-Language
code	I-Language
.	O
</s>
<s>
It	O
uses	O
a	O
simple	O
text	O
notation	O
for	O
music	O
input	O
,	O
which	O
LilyPond	B-Application
interprets	O
and	O
processes	O
in	O
a	O
series	O
of	O
stages	O
.	O
</s>
<s>
In	O
the	O
final	O
stage	O
,	O
music	O
notation	O
is	O
output	O
to	O
PDF	B-Application
(	O
via	O
PostScript	B-Language
)	O
or	O
other	O
graphical	O
formats	O
,	O
such	O
as	O
SVG	B-Application
or	O
PNG	O
.	O
</s>
<s>
LilyPond	B-Application
can	O
also	O
generate	O
MIDI	O
files	O
that	O
correspond	O
to	O
the	O
music	O
notation	O
output	O
.	O
</s>
<s>
LilyPond	B-Application
is	O
a	O
text-based	B-Device
application	I-Device
,	O
so	O
it	O
does	O
not	O
contain	O
its	O
own	O
graphical	B-Application
user	I-Application
interface	I-Application
to	O
assist	O
with	O
score	B-Application
creation	O
.	O
</s>
<s>
(	O
However	O
,	O
a	O
text-editor	O
based	O
"	O
LilyPad	O
"	O
GUI	B-Application
for	O
Windows	O
and	O
MacOS	O
is	O
included	O
by	O
default	O
on	O
these	O
systems	O
.	O
)	O
</s>
<s>
It	O
does	O
,	O
however	O
,	O
have	O
a	O
flexible	O
input	O
language	O
that	O
strives	O
to	O
be	O
simple	O
,	O
easing	O
the	O
learning	B-General_Concept
curve	I-General_Concept
for	O
new	O
users	O
.	O
</s>
<s>
LilyPond	B-Application
adheres	O
to	O
the	O
WYSIWYM	B-General_Concept
paradigm	O
;	O
the	O
workflow	O
for	O
typesetting	O
music	O
notation	O
with	O
LilyPond	B-Application
is	O
similar	O
to	O
that	O
of	O
preparing	O
documents	O
with	O
LaTeX	B-Application
.	O
</s>
<s>
LilyPond	B-Application
supports	O
experimental	O
musical	O
notation	O
.	O
</s>
<s>
LilyPond	B-Application
's	O
primary	O
goal	O
is	O
to	O
produce	O
output	O
comparable	O
to	O
professionally	O
engraved	O
scores	O
instead	O
of	O
output	O
that	O
looks	O
mechanical	O
and	O
computer-generated	O
.	O
</s>
<s>
An	O
essay	O
from	O
the	O
LilyPond	B-Application
website	O
,	O
written	O
by	O
LilyPond	B-Application
developers	O
,	O
explains	O
some	O
typographical	O
issues	O
addressed	O
by	O
LilyPond	B-Application
:	O
</s>
<s>
The	O
native	O
input	O
language	O
for	O
LilyPond	B-Application
is	O
comprehensive	O
,	O
and	O
consists	O
of	O
many	O
commands	O
needed	O
for	O
expressing	O
any	O
sort	O
of	O
articulation	O
,	O
dynamic	O
,	O
meter	O
,	O
etc	O
.	O
</s>
<s>
It	O
is	O
similar	O
to	O
that	O
of	O
TeX	B-Application
.	O
</s>
<s>
The	O
ability	O
to	O
embed	O
Scheme	B-Language
code	O
within	O
a	O
LilyPond	B-Application
source	O
file	O
permits	O
arbitrary	O
extensions	O
to	O
the	O
input	O
language	O
and	O
assists	O
with	O
algorithmic	O
composition	O
.	O
</s>
<s>
The	O
semantics	O
of	O
the	O
pitch-duration	O
format	O
change	O
depending	O
on	O
the	O
active	O
input	O
mode	O
;	O
this	O
is	O
explained	O
in	O
depth	O
in	O
the	O
LilyPond	B-Application
manual	O
.	O
</s>
<s>
LilyPond	B-Application
's	O
interface	O
with	O
Pango	B-Language
requires	O
the	O
input	O
character	B-General_Concept
encoding	I-General_Concept
to	O
be	O
UTF-8	O
.	O
</s>
<s>
Lilypond	B-Application
can	O
also	O
create	O
extensively	O
customised	O
output	O
.	O
</s>
<s>
Several	O
graphical	O
scorewriters	B-Application
—	O
such	O
as	O
Rosegarden	B-Language
,	O
NoteEdit	B-Language
,	O
Canorus	O
,	O
Denemo	B-Language
,	O
and	O
TuxGuitar	B-Language
—	O
can	O
export	O
files	O
directly	O
to	O
LilyPond	B-Application
format	O
.	O
</s>
<s>
Other	O
graphical	O
applications	O
serve	O
as	O
front	O
ends	O
to	O
LilyPond	B-Application
,	O
including	O
Frescobaldi	B-Language
and	O
the	O
LilyPondTool	O
plugin	O
for	O
jEdit	B-Language
.	O
</s>
<s>
Denemo	B-Language
integrates	O
the	O
PDF	B-Application
output	O
of	O
LilyPond	B-Application
in	O
its	O
display	O
,	O
allowing	O
some	O
editing	O
operations	O
on	O
the	O
final	O
typeset	O
score	B-Application
.	O
</s>
<s>
The	O
Mutopia	O
Project	O
,	O
which	O
distributes	O
free	O
content	O
sheet	O
music	O
,	O
uses	O
LilyPond	B-Application
to	O
typeset	O
its	O
music	O
,	O
as	O
does	O
Musipedia	O
,	O
a	O
collaborative	O
music	O
encyclopedia	O
.	O
</s>
<s>
Emacs	B-Application
 '	O
org-mode	B-Operating_System
contains	O
support	O
for	O
embedding	O
LilyPond	B-Application
scores	O
into	O
documents	O
.	O
</s>
<s>
OOoLilyPond	O
,	O
a	O
LibreOffice	B-Application
extension	O
provides	O
support	O
for	O
calling	O
LilyPond	B-Application
to	O
embed	O
scores	O
into	O
documents	O
.	O
</s>
<s>
Lilypond	B-Application
is	O
available	O
in	O
MediaWiki	B-Application
via	O
the	O
code	O
.	O
</s>
<s>
More	O
complex	O
scores	O
,	O
including	O
lyrics	O
,	O
are	O
also	O
possible	O
within	O
MediaWiki	B-Application
wikis	I-Application
.	O
</s>
<s>
Integration	O
of	O
lilypond	B-Application
musical	O
elements	O
into	O
various	O
document	O
formats	O
(	O
both	O
TeX-based	O
systems	O
such	O
as	O
LaTeX	B-Application
and	O
Texinfo	B-Application
,	O
and	O
also	O
DocBook	B-Protocol
and	O
HTML	B-Language
pages	O
)	O
is	O
natively	O
supported	O
through	O
the	O
companion	O
program	O
lilypond-book	O
,	O
developed	O
and	O
maintained	O
by	O
the	O
LilyPond	B-Application
community	O
.	O
</s>
<s>
For	O
integration	O
into	O
the	O
LaTeX	B-Application
document	O
preparation	O
system	O
,	O
lyLuaTeX	O
has	O
been	O
developed	O
as	O
a	O
LuaLaTeX	O
package	O
to	O
embed	O
musical	O
elements	O
within	O
texts	O
.	O
</s>
<s>
Finale	B-Application
and	O
Sibelius	B-Device
are	O
two	O
proprietary	B-Application
scorewriters	B-Application
often	O
compared	O
to	O
LilyPond	B-Application
.	O
</s>
<s>
Andrew	O
Hawryluk	O
,	O
a	O
LilyPond	B-Application
user	O
,	O
wrote	O
a	O
series	O
of	O
articles	O
comparing	O
output	O
quality	O
between	O
Finale	B-Application
and	O
LilyPond	B-Application
.	O
</s>
<s>
Another	O
scorewriter	B-Application
with	O
comparable	O
features	O
to	O
LilyPond	B-Application
is	O
SCORE	B-Application
,	O
but	O
SCORE	B-Application
relies	O
on	O
manual	O
positioning	O
more	O
than	O
Lilypond	B-Application
does	O
.	O
</s>
<s>
See	O
also	O
Comparison	B-Application
of	I-Application
scorewriters	I-Application
.	O
</s>
