6 Jan
2005
6 Jan
'05
4:08 a.m.
I've got this really noisy audio file I'm trying to clean up, and
I was thinking, it would be really cool if I could run a clip of
the file that was just the noise(it's a recording of a discussion
for a TV broadcast, so when no one's talking, it should be
silent) and have the program output an average frequency content,
in some sort of format that another program could take it as
input and create a filter that would filter out those
frequencies. It seems like brutefir would be able to do the
latter part, but is there a way to automatically generate the
filter definition from the frequency content of a file? Is this a
feasable method of noise reduction? If it seems like it could
work, but there isn't a program to do it, I would be interested
in writing it, if anyone has any input.
Thanks!
-spencer
6 Jan
6 Jan
4:33 a.m.
On Thu, 06 Jan 2005 01:42:36 -0600
Spencer Russell <Spencer.Russell(a)oberlin.edu> wrote:
I've got this really noisy audio file I'm
trying to clean up, and
I was thinking, it would be really cool if I could run a clip of
the file that was just the noise(it's a recording of a discussion
for a TV broadcast, so when no one's talking, it should be
silent) and have the program output an average frequency content,
in some sort of format that another program could take it as
input and create a filter that would filter out those
frequencies. It seems like brutefir would be able to do the
latter part, but is there a way to automatically generate the
filter definition from the frequency content of a file? Is this a
feasable method of noise reduction? If it seems like it could
work, but there isn't a program to do it, I would be interested
in writing it, if anyone has any input.
If you are trying to clean up a file, a doubt the system you
describe above would produce results anywhere near as good as
Gnome Wave Cleaner.
http://gwc.sourceforge.net/
Erik
--
+-----------------------------------------------------------+
Erik de Castro Lopo nospam(a)mega-nerd.com (Yes it's valid)
+-----------------------------------------------------------+
C++ is a siren song. It *looks* like a HLL in which you ought to be
able to write an application, but it really isn't."
-- Alain Picard (comp.lang.lisp)
12:29 p.m.
On Thu, 2005-01-06 at 01:42 -0600, Spencer Russell wrote:
I've got this really noisy audio file I'm
trying to clean up, and
I was thinking, it would be really cool if I could run a clip of
the file that was just the noise(it's a recording of a discussion
for a TV broadcast, so when no one's talking, it should be
silent) and have the program output an average frequency content,
in some sort of format that another program could take it as
input and create a filter that would filter out those
frequencies. It seems like brutefir would be able to do the
latter part, but is there a way to automatically generate the
filter definition from the frequency content of a file? Is this a
feasable method of noise reduction? If it seems like it could
work, but there isn't a program to do it, I would be interested
in writing it, if anyone has any input.
It certainly should work, because this is exactly how the NR plugin in
Cool Edit Pro works. Sound Forge has something similar. I have used
this to remove analog hiss from old Dead bootlegs. No idea how to do it
on Linux.
You should not need 2 programs, this should be as easy as select the
noise, "NR -> Analyze", select entire .wav, "NR -> Go", or
something.
Any decent .wav editor should do it. All of them do on Windows. If
this really can't be done easily on Linux, that's discouraging, it means
we have a LONG way to go.
Lee
12:40 p.m.
On Thu, 06 Jan, 2005 at 11:29AM -0500, Lee Revell spake thus:
On Thu, 2005-01-06 at 01:42 -0600, Spencer Russell
wrote:
Don't panic. Audacity does it.
I've got this really noisy audio file I'm
trying to clean up, and
I was thinking, it would be really cool if I could run a clip of
the file that was just the noise(it's a recording of a discussion
for a TV broadcast, so when no one's talking, it should be
silent) and have the program output an average frequency content,
in some sort of format that another program could take it as
input and create a filter that would filter out those
frequencies. It seems like brutefir would be able to do the
latter part, but is there a way to automatically generate the
filter definition from the frequency content of a file? Is this a
feasable method of noise reduction? If it seems like it could
work, but there isn't a program to do it, I would be interested
in writing it, if anyone has any input.
It certainly should work, because this is exactly how the NR plugin in
Cool Edit Pro works. Sound Forge has something similar. I have used
this to remove analog hiss from old Dead bootlegs. No idea how to do it
on Linux.
You should not need 2 programs, this should be as easy as select the
noise, "NR -> Analyze", select entire .wav, "NR -> Go", or
something.
Any decent .wav editor should do it. All of them do on Windows. If
this really can't be done easily on Linux, that's discouraging, it means
we have a LONG way to go. Lee
--
"I'd crawl over an acre of 'Visual This++' and 'Integrated
Development
That' to get to gcc, Emacs, and gdb. Thank you."
(By Vance Petree, Virginia Power)
12:42 p.m.
On Thu, 2005-01-06 at 11:29 -0500, Lee Revell wrote:
Any decent .wav editor should do it. All of them do
on Windows. If
this really can't be done easily on Linux, that's discouraging, it means
we have a LONG way to go.
OK, I see that after reading the LAU thread, the same applies to Linux.
Please don't cross post between LAU and LAD unless you have a good
reason. Your question should have been posted to LAU.
Lee
8:30 p.m.
On Thu, Jan 06, 2005 at 11:42:36AM -0500, Lee Revell wrote:
On Thu, 2005-01-06 at 11:29 -0500, Lee Revell wrote:
Please don't cross post between LAU and LAD unless you have a good
reason. Your question should have been posted to LAU.
Lee
My question was, in addition to asking about available tools, was
also about the feasability of that sort of algorithm in general,
so I felt it alright to post to both. I suppose if i'd have been
thinking ahead, I would've posted to LAU, and if it wasn't
available, THEN posted to LAD about writing it.
-spencer
7204
days inactive
7204
days old
linux-audio-dev@lists.linuxaudio.org
5 comments
4 participants
participants (4)
-
Erik de Castro Lopo -
james＠dis-dot-dat.net -
Lee Revell -
Spencer Russell