<s>
A	O
tag	B-Application
editor	I-Application
is	O
an	O
app	O
that	O
can	O
add	O
,	O
edit	O
,	O
or	O
remove	O
embedded	O
metadata	O
on	O
multimedia	O
file	O
formats	O
.	O
</s>
<s>
Content	O
creators	O
,	O
such	O
as	O
musicians	B-Application
,	O
photographers	O
,	O
podcasters	O
,	O
and	O
video	O
producers	O
,	O
may	O
need	O
to	O
properly	O
label	O
and	O
manage	O
their	O
creations	O
,	O
adding	O
such	O
details	O
as	O
title	O
,	O
creator	O
,	O
date	O
of	O
creation	O
,	O
and	O
copyright	O
notice	O
.	O
</s>
<s>
Tag	B-Application
editors	I-Application
,	O
however	O
,	O
are	O
apps	O
dedicated	O
to	O
processing	O
metadata	O
,	O
such	O
as	O
DigiKam	B-Language
and	O
MusicBrainz	B-Language
Picard	I-Language
.	O
</s>
<s>
Their	O
features	O
go	O
beyond	O
manual	O
editing	O
of	O
individual	O
files	O
,	O
offering	O
batch	B-General_Concept
processing	I-General_Concept
and	O
semi-automatic	O
content	O
identification	O
.	O
</s>
<s>
Media	O
players	O
such	O
as	O
iTunes	B-Operating_System
,	O
Foobar2000	B-Application
or	O
Winamp	B-Application
,	O
as	O
well	O
as	O
dedicated	O
tag	O
editing	O
programs	O
allow	O
users	O
to	O
manually	O
edit	O
tag	O
and	O
song	O
file	O
information	O
,	O
including	O
composer	O
and	O
release	O
year	O
.	O
</s>
<s>
Dedicated	O
tag	B-Application
editors	I-Application
may	O
feature	O
batch	B-General_Concept
processing	I-General_Concept
and	O
creating	O
tags	O
from	O
file	O
names	O
and	O
vice	O
versa	O
.	O
</s>
<s>
One	O
type	O
of	O
tag	B-Application
editor	I-Application
compares	O
the	O
existing	O
metadata	O
in	O
an	O
audio	O
file	O
's	O
tags	O
with	O
the	O
information	O
from	O
online	O
music	O
databases	O
,	O
such	O
as	O
Gracenote	O
,	O
Discogs	O
,	O
freedb	O
,	O
Zortam	O
Music	O
Internet	O
Database	O
(	O
ZMLIMD	O
)	O
or	O
MusicBrainz	B-Application
.	O
</s>
<s>
In	O
hash	O
function	O
,	O
for	O
audio	O
identification	O
,	O
such	O
as	O
finding	O
out	O
whether	O
an	O
MP3	B-Application
file	I-Application
matches	O
one	O
of	O
a	O
list	O
of	O
known	O
items	O
,	O
one	O
could	O
use	O
a	O
conventional	O
hash	O
function	O
such	O
as	O
MD5	B-Algorithm
,	O
but	O
this	O
would	O
be	O
very	O
sensitive	O
to	O
highly	O
likely	O
perturbations	O
such	O
as	O
time-shifting	O
,	O
CD	B-Device
read	O
errors	O
,	O
different	O
compression	B-General_Concept
algorithms	I-General_Concept
or	O
implementations	O
or	O
changes	O
in	O
volume	O
.	O
</s>
<s>
Using	O
something	O
like	O
MD5	B-Algorithm
is	O
useful	O
as	O
a	O
first	O
pass	O
to	O
find	O
exactly-identical	O
files	O
,	O
but	O
another	O
,	O
more	O
advanced	O
algorithm	O
is	O
required	O
to	O
find	O
all	O
items	O
that	O
would	O
nonetheless	O
be	O
interpreted	O
as	O
identical	O
by	O
a	O
human	O
listener	O
.	O
</s>
<s>
The	O
following	O
is	O
a	O
list	B-Application
of	I-Application
tag	I-Application
editors	I-Application
.	O
</s>
<s>
Free	B-License
and	I-License
open-source	I-License
software	I-License
:	O
</s>
<s>
EasyTag	B-Language
–	O
Supports	O
MP3	B-Application
,	O
MP2	O
,	O
FLAC	B-Application
,	O
Ogg	O
,	O
MP4	O
,	O
Musepack	B-Algorithm
(	O
MPC	B-Algorithm
)	O
,	O
Monkey	B-Language
's	I-Language
Audio	I-Language
(	O
APE	B-Language
)	O
,	O
and	O
WavPack	B-Application
formats	O
.	O
</s>
<s>
Available	O
for	O
Linux	B-Application
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
Ex	O
Falso	O
–	O
Supports	O
MP3	B-Application
,	O
FLAC	B-Application
,	O
Ogg	O
,	O
MP4	O
,	O
MPC	B-Algorithm
,	O
WMA	B-Application
,	O
APE	B-Language
,	O
MIDI	O
,	O
and	O
WavPack	B-Application
.	O
</s>
<s>
Available	O
for	O
FreeBSD	B-Operating_System
,	O
Linux	B-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
,	O
and	O
Windows	O
.	O
</s>
<s>
Kid3	B-Language
–	O
Supports	O
MP3	B-Application
,	O
MP2	O
,	O
FLAC	B-Application
,	O
Ogg	O
,	O
MP4	O
,	O
MPC	B-Algorithm
,	O
WMA	B-Application
,	O
AAC	O
,	O
Opus	B-Algorithm
,	O
Speex	O
,	O
TrueAudio	O
,	O
WavPack	B-Application
,	O
WAV	O
,	O
AIFF	O
,	O
and	O
tracker	O
module	O
(	O
MOD	O
,	O
S3M	O
,	O
IT	O
,	O
XM	O
)	O
formats	O
.	O
</s>
<s>
Available	O
for	O
FreeBSD	B-Operating_System
,	O
Linux	B-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
and	O
Windows	O
.	O
</s>
<s>
MusicBrainz	B-Language
Picard	I-Language
–	O
Supports	O
MP3	B-Application
,	O
FLAC	B-Application
,	O
Ogg	O
,	O
MP4	O
,	O
MPC	B-Algorithm
,	O
WMA	B-Application
,	O
APE	B-Language
,	O
OptimFROG	B-Algorithm
,	O
and	O
WavPack	B-Application
.	O
</s>
<s>
Available	O
for	O
FreeBSD	B-Operating_System
,	O
Linux	B-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
and	O
Windows	O
.	O
</s>
<s>
puddletag	B-Language
–	O
Supports	O
MP3	B-Application
,	O
FLAC	B-Application
,	O
Ogg	O
,	O
APE	B-Language
,	O
MP4	O
,	O
MPC	B-Algorithm
,	O
WMA	B-Application
,	O
OptimFROG	B-Algorithm
,	O
TAK	O
,	O
and	O
WavPack	B-Application
.	O
</s>
<s>
Available	O
for	O
FreeBSD	B-Operating_System
and	O
Linux	B-Application
.	O
</s>
<s>
Proprietary	B-Application
software	I-Application
:	O
</s>
<s>
File	B-Protocol
Explorer	I-Protocol
–	O
has	O
limited	O
tag	O
editing	O
capabilities	O
on	O
supported	O
file	O
formats	O
such	O
as	O
MP3	B-Application
and	O
WMA	B-Application
.	O
</s>
<s>
Jaikoz	B-Language
–	O
Commercial	O
package	O
,	O
available	O
for	O
Windows	O
,	O
Linux	B-Application
and	O
OS	O
X	O
that	O
uses	O
the	O
MusicBrainz	B-Application
database	O
for	O
auto-tagging	O
.	O
</s>
<s>
Mp3tag	B-Language
–	O
Supports	O
MP3	B-Application
,	O
FLAC	B-Application
,	O
Ogg	O
,	O
MP4	O
,	O
MPC	B-Algorithm
,	O
WMA	B-Application
,	O
APE	B-Language
,	O
OptimFROG	B-Algorithm
,	O
TAK	O
,	O
and	O
WavPack	B-Application
.	O
</s>
<s>
Freeware	B-License
for	O
Windows	O
.	O
</s>
<s>
TagScanner	O
–	O
Supports	O
MP3	B-Application
,	O
Ogg	O
,	O
FLAC	B-Application
,	O
WMA	B-Application
,	O
MP4	O
,	O
Opus	B-Algorithm
,	O
Musepack	B-Algorithm
,	O
APE	B-Language
,	O
AAC	O
,	O
OptimFROG	B-Algorithm
,	O
Speex	O
,	O
WavPack	B-Application
,	O
TrueAudio	O
and	O
WAV	O
,	O
AIFF	O
.	O
</s>
<s>
Freeware	B-License
for	O
Windows	O
.	O
</s>
<s>
Free	B-License
and	I-License
open-source	I-License
:	O
</s>
<s>
Proprietary	B-Application
software	I-Application
:	O
</s>
<s>
File	B-Protocol
Explorer	I-Protocol
has	O
limited	O
tag	O
editing	O
capabilities	O
on	O
MP4	O
and	O
WMV	B-Application
files	I-Application
.	O
</s>
