<s>
Audacity	B-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
digital	B-Application
audio	I-Application
editor	I-Application
and	O
recording	O
application	B-Application
software	I-Application
,	O
available	O
for	O
Windows	B-Application
,	O
macOS	B-Application
,	O
Linux	B-Application
,	O
and	O
other	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
.	O
</s>
<s>
As	O
of	O
December	O
6	O
,	O
2022	O
,	O
Audacity	B-Language
is	O
the	O
most	O
popular	O
download	O
at	O
FossHub	O
,	O
with	O
over	O
114.2	O
million	O
downloads	O
since	O
March	O
2015	O
.	O
</s>
<s>
It	O
was	O
previously	O
served	O
from	O
Google	O
Code	O
and	O
SourceForge	B-Application
,	O
where	O
it	O
was	O
downloaded	O
over	O
200	O
million	O
times	O
.	O
</s>
<s>
It	O
is	O
licensed	O
under	O
GPL-2.0-or-later	B-License
.	O
</s>
<s>
Executables	O
with	O
VST3	O
support	O
are	O
licensed	O
GPL-3-only	O
to	O
maintain	O
license	O
compatibility	O
.	O
</s>
<s>
The	O
project	O
was	O
started	O
in	O
the	O
fall	O
of	O
1999	O
by	O
Dominic	B-Language
Mazzoni	I-Language
and	O
Roger	O
Dannenberg	O
at	O
Carnegie	O
Mellon	O
University	O
,	O
initially	O
under	O
the	O
name	O
CMU	O
Visual	O
Audio	O
.	O
</s>
<s>
On	O
May	O
28	O
,	O
2000	O
,	O
Audacity	B-Language
was	O
released	O
as	O
Audacity	B-Language
0.8	O
to	O
the	O
public	O
.	O
</s>
<s>
Mazzoni	O
eventually	O
left	O
CMU	O
to	O
pursue	O
software	O
development	O
and	O
in	O
particular	O
development	O
of	O
Audacity	B-Language
,	O
with	O
Dannenberg	O
remaining	O
at	O
CMU	O
and	O
continuing	O
development	O
of	O
Nyquist	B-Application
,	O
a	O
scripting	O
language	O
which	O
Audacity	B-Language
uses	O
for	O
some	O
effects	O
.	O
</s>
<s>
In	O
April	O
2021	O
,	O
it	O
was	O
announced	O
that	O
Muse	O
Group	O
(	O
owners	O
of	O
MuseScore	B-Language
and	O
Ultimate	O
Guitar	O
)	O
would	O
acquire	O
the	O
Audacity	B-Language
trademark	O
and	O
continue	O
to	O
develop	O
the	O
application	O
,	O
which	O
remains	O
free	B-License
and	I-License
open	I-License
source	I-License
.	O
</s>
<s>
In	O
addition	O
to	O
recording	O
audio	O
from	O
multiple	O
sources	O
,	O
Audacity	B-Language
can	O
be	O
used	O
for	O
post-processing	O
of	O
all	O
types	O
of	O
audio	O
,	O
including	O
effects	O
such	O
as	O
normalization	O
,	O
trimming	O
,	O
and	O
fading	O
in	O
and	O
out	O
.	O
</s>
<s>
It	O
is	O
currently	O
used	O
in	O
the	O
Sound	O
Creation	O
unit	O
of	O
the	O
UK	O
OCR	O
National	O
Level	O
2	O
ICT	B-General_Concept
course	O
.	O
</s>
<s>
Audacity	B-Language
can	O
record	O
multiple	O
tracks	O
at	O
once	O
,	O
provided	O
the	O
sound	O
card	O
supports	O
it	O
.	O
</s>
<s>
Historically	O
,	O
Audacity	B-Language
is	O
a	O
destructive	O
editor	O
,	O
meaning	O
all	O
changes	O
are	O
directly	O
applied	O
to	O
the	O
waveform	O
.	O
</s>
<s>
Audacity	B-Language
natively	O
imports	O
and	O
exports	O
WAV	O
,	O
AIFF	O
,	O
MP3	B-Application
,	O
Ogg	B-Algorithm
Vorbis	I-Algorithm
,	O
and	O
all	O
file	O
formats	O
supported	O
by	O
libsndfile	B-Language
library	O
.	O
</s>
<s>
Due	O
to	O
patent	O
licensing	O
concerns	O
,	O
the	O
FFmpeg	B-Library
library	O
necessary	O
to	O
import	O
and	O
export	O
proprietary	O
formats	O
such	O
as	O
M4A	O
(	O
AAC	B-Application
)	O
and	O
WMA	B-Application
is	O
not	O
bundled	O
with	O
Audacity	B-Language
but	O
has	O
to	O
be	O
downloaded	O
separately	O
.	O
</s>
<s>
In	O
conjunction	O
with	O
batch	O
processing	O
features	O
,	O
Audacity	B-Language
can	O
be	O
used	O
to	O
convert	O
files	O
from	O
one	O
format	O
to	O
another	O
,	O
or	O
to	O
digitize	O
records	O
,	O
tapes	O
or	O
MiniDiscs	O
.	O
</s>
<s>
Audacity	B-Language
supports	O
LADSPA	B-Language
,	O
LV2	B-Application
,	O
VST	B-Application
,	O
VST3	O
,	O
Audio	B-Operating_System
Units	I-Operating_System
,	O
Vamp	O
and	O
Nyquist	B-Application
plugins	O
,	O
which	O
allows	O
it	O
to	O
load	O
most	O
audio	O
effect	O
plugins	O
.	O
</s>
<s>
It	O
additionally	O
features	O
a	O
console	O
for	O
Nyquist	B-Application
,	O
a	O
Lisp	B-Language
dialect	O
,	O
in	O
which	O
users	O
can	O
script	O
their	O
own	O
plugins	O
and	O
support	O
for	O
external	O
python	O
scripting	O
.	O
</s>
<s>
Audacity	B-Language
is	O
somewhat	O
customizable	O
and	O
supports	O
arbitrary	O
arrangements	O
of	O
its	O
toolbars	O
,	O
custom	O
themes	O
and	O
enabling	O
and	O
disabling	O
of	O
several	O
features	O
.	O
</s>
<s>
Audacity	B-Language
has	O
several	O
features	O
to	O
allow	O
for	O
spectrum	O
analysis	O
using	O
the	O
Fourier	B-Algorithm
transform	I-Algorithm
algorithm	O
and	O
spectrograms	O
.	O
</s>
<s>
While	O
Audacity	B-Language
has	O
some	O
features	O
found	O
in	O
Digital	B-General_Concept
Audio	I-General_Concept
Workstation	I-General_Concept
,	O
it	O
should	O
not	O
be	O
considered	O
as	O
such	O
yet	O
.	O
</s>
<s>
In	O
its	O
current	O
form	O
it	O
's	O
an	O
audio	B-Application
editor	I-Application
and	O
recorder	O
.	O
</s>
<s>
Due	O
to	O
the	O
use	O
of	O
wxWidgets	B-Language
,	O
which	O
do	O
not	O
have	O
full	O
iOS	O
or	O
Android	O
support	O
,	O
Audacity	B-Language
cannot	O
run	O
on	O
mobile	O
platforms	O
.	O
</s>
<s>
In	O
addition	O
to	O
English	O
,	O
Audacity	B-Language
is	O
available	O
in	O
Afrikaans	O
,	O
Arabic	O
,	O
Basque	O
,	O
Bulgarian	O
,	O
Catalan	O
,	O
Chinese	O
(	O
simplified	O
)	O
,	O
Chinese	O
(	O
traditional	O
)	O
,	O
Corsican	O
,	O
Czech	O
,	O
Danish	O
,	O
Dutch	O
,	O
Finnish	O
,	O
French	O
,	O
Galician	O
,	O
German	O
,	O
Greek	O
,	O
Hungarian	O
,	O
Irish	O
,	O
Italian	O
,	O
Japanese	O
,	O
Lithuanian	O
,	O
Macedonian	O
,	O
Marathi	O
,	O
Norwegian	O
(	O
Bokmål	O
)	O
,	O
Polish	O
,	O
Portuguese	O
(	O
Brazilian	O
)	O
,	O
Romanian	O
,	O
Russian	O
,	O
Slovak	O
,	O
Slovenian	O
,	O
Spanish	O
,	O
Swedish	O
,	O
Turkish	O
,	O
Ukrainian	O
,	O
Vietnamese	O
and	O
Welsh	O
.	O
</s>
<s>
The	O
documentation	O
,	O
the	O
Audacity	B-Language
Manual	O
,	O
is	O
available	O
only	O
in	O
English	O
.	O
</s>
<s>
The	O
Audacity	B-Language
Forum	O
offers	O
technical	O
support	O
in	O
Spanish	O
,	O
French	O
,	O
Russian	O
and	O
German	O
.	O
</s>
<s>
The	O
diagram	O
illustrates	O
Audacity	B-Language
's	O
layers	O
and	O
modules	O
.	O
</s>
<s>
Note	O
the	O
three	O
important	O
classes	O
within	O
wxWidgets	B-Language
,	O
each	O
of	O
which	O
has	O
a	O
reflection	O
in	O
Audacity	B-Language
.	O
</s>
<s>
For	O
example	O
,	O
the	O
BlockFile	O
system	O
is	O
a	O
reflection	O
of	O
and	O
is	O
built	O
on	O
wxWidgets	B-Language
 '	O
wxFiles	O
.	O
</s>
<s>
Both	O
wxWidgets	B-Language
and	O
PortAudio	B-Language
are	O
OS	O
abstraction	O
layers	O
,	O
containing	O
conditional	O
code	O
that	O
chooses	O
different	O
implementations	O
depending	O
on	O
the	O
target	O
platform	O
.	O
</s>
<s>
As	O
free	B-License
and	I-License
open-source	I-License
software	I-License
,	O
Audacity	B-Language
is	O
very	O
popular	O
in	O
education	O
,	O
encouraging	O
its	O
developers	O
to	O
make	O
the	O
user	O
interface	O
easier	O
for	O
students	O
and	O
teachers	O
.	O
</s>
<s>
Audacity	B-Language
won	O
the	O
SourceForge	B-Application
2007	O
and	O
2009	O
Community	O
Choice	O
Award	O
for	O
Best	O
Project	O
for	O
Multimedia	O
.	O
</s>
<s>
Jamie	O
Lendino	O
of	O
PC	O
Magazine	O
recently	O
rated	O
it	O
4/5	O
stars	O
Excellent	O
and	O
said	O
,	O
"	O
If	O
you	O
're	O
looking	O
to	O
get	O
started	O
in	O
podcasting	O
or	O
recording	O
music	O
,	O
it	O
's	O
tough	O
to	O
go	O
wrong	O
with	O
Audacity	B-Language
.	O
</s>
<s>
A	O
powerful	O
,	O
free	O
,	O
open-source	B-Application
audio	B-Application
editor	I-Application
that	O
's	O
been	O
available	O
for	O
years	O
,	O
Audacity	B-Language
is	O
still	O
the	O
go-to	O
choice	O
for	O
quick-and-dirty	O
audio	O
work.	O
"	O
</s>
<s>
CNET	O
rated	O
Audacity	B-Language
5/5	O
stars	O
,	O
calling	O
it	O
"	O
feature-rich	O
and	O
flexible	O
"	O
.	O
</s>
<s>
Preston	O
Gralla	O
of	O
PC	O
World	O
said	O
,	O
"	O
If	O
you	O
're	O
interested	O
in	O
creating	O
,	O
editing	O
,	O
and	O
mixing	O
you	O
'll	O
want	O
Audacity.	O
"	O
</s>
<s>
In	O
The	O
Art	O
of	O
Unix	O
Programming	O
(	O
2003	O
)	O
,	O
open-source	B-Application
software	I-Application
advocate	O
Eric	O
S	O
.	O
Raymond	O
wrote	O
of	O
Audacity	B-Language
,	O
"	O
The	O
central	O
virtue	O
of	O
this	O
program	O
is	O
that	O
it	O
has	O
a	O
superbly	O
transparent	O
and	O
natural	O
user	O
interface	O
,	O
one	O
that	O
erects	O
as	O
few	O
barriers	O
between	O
the	O
user	O
and	O
the	O
sound	O
file	O
as	O
possible.	O
"	O
</s>
<s>
Some	O
reviewers	O
and	O
users	O
have	O
criticized	O
Audacity	B-Language
for	O
its	O
inconvenient	O
UX	O
design	O
,	O
unsightly	O
GUI	O
and	O
comparative	O
lack	O
of	O
features	O
compared	O
with	O
Adobe	O
Audition	O
.	O
</s>
<s>
Matthew	O
McLean	O
wrote	O
"	O
Audacity	B-Language
looks	O
a	O
bit	O
more	O
dated	O
and	O
basic	O
,	O
but	O
this	O
will	O
be	O
appealing	O
to	O
many	O
folks	O
who	O
’re	O
just	O
starting	O
out	O
"	O
.	O
</s>
<s>
Some	O
users	O
responded	O
negatively	O
,	O
with	O
accusations	O
of	O
turning	O
Audacity	B-Language
into	O
spyware	O
.	O
</s>
<s>
That	O
July	O
,	O
the	O
Audacity	B-Language
team	O
apologized	O
for	O
the	O
changes	O
to	O
the	O
privacy	O
policy	O
and	O
removed	O
mention	O
of	O
the	O
data	O
storage	O
provision	O
which	O
was	O
added	O
"	O
out	O
of	O
an	O
abundance	O
of	O
caution.	O
"	O
</s>
<s>
This	O
table	O
shows	O
the	O
major	O
and	O
minor	O
releases	O
of	O
Audacity	B-Language
.	O
</s>
<s>
In	O
April	O
2022	O
,	O
an	O
official	O
Audacity	B-Language
app	O
was	O
added	O
to	O
the	O
Microsoft	O
Store	O
.	O
</s>
<s>
3.017	O
Mar	O
2021This	O
version	O
introduced	O
a	O
new	O
project	O
file	O
format	O
,	O
.aup3	B-Language
,	O
using	O
an	O
SQLite	B-Language
database	O
to	O
store	O
each	O
project	O
in	O
a	O
single	O
database	O
file	O
.	O
</s>
<s>
From	O
2.3.2	O
on	O
,	O
a	O
mod-script-pipe	O
for	O
driving	O
Audacity	B-Language
from	O
Python	O
(	O
can	O
be	O
enabled	O
in	O
Preferences	O
)	O
2.202	O
November	O
2017This	O
version	O
ports	O
changes	O
from	O
Dark	O
Audacity	B-Language
to	O
Audacity	B-Language
,	O
adding	O
themes	O
.	O
</s>
<s>
Saving	O
and	O
loading	O
user	O
presets	O
for	O
effect	O
settings	O
across	O
sessions	O
(	O
version	O
2.1.0	O
on	O
)	O
Scrubbing	B-Application
(	O
audio	O
)	O
(	O
Version	O
2.1.1	O
and	O
later	O
)	O
2.013	O
March	O
2012This	O
version	O
adds	O
a	O
Device	O
Toolbar	O
to	O
manage	O
inputs	O
and	O
outputs	O
,	O
Timer	O
Record	O
and	O
a	O
Mixer	O
Board	O
view	O
with	O
per-track	O
VU	O
meters	O
.	O
</s>
<s>
Version	O
1.3.2	O
and	O
later	O
supported	O
Free	B-Application
Lossless	I-Application
Audio	I-Application
Codec	I-Application
(	O
FLAC	B-Application
)	O
.	O
</s>
<s>
Version	O
1.3.6	O
and	O
later	O
also	O
supported	O
additional	O
formats	O
such	O
as	O
WMA	B-Application
,	O
AAC	B-Application
,	O
AMR	B-Algorithm
and	O
AC3	O
via	O
the	O
optional	O
FFmpeg	B-Library
library	O
.	O
</s>
