3 Jul
2004
3 Jul
'04
8:41 a.m.
Hi,
I need to automate a process for slicing audio files in AIFF format on multiple
files everytime perfect silences are met (zero-amplitude). This should be
multiplatform (Linux/Mac/Win) and minimal (no GUI, only command-lines: one
should just have to launch the script / program). The handling of standard UNIX
commands like changing and listing directories, moving or renaming files... is
requested.
I've thought of Octave or Scilab but I couldn't find their Mac version and the
AIFF file-handling wasn't that great. Alternatively, I could write a shell
script, but I think I'd still need a piece of software to understand the audio
files and determine whether it's silent or not. Sox? At last, I could write my
own C software, bearing in mind it may need customizing along the OS where it is
compiled...
Any idea?
Cheers,
Christian Frisson
3 Jul
3 Jul
9:27 a.m.
I need to automate a process for slicing audio files
in AIFF format on
multiple files everytime perfect silences are met (zero-amplitude).
Do you really mean PERFECT silence? If so, that's a fairly trivial program
to write.
If you use Erik de Castro Lopo's libsndfile
<http://www.mega-nerd.com/libsndfile/>, then you can be completely freed
from having to worry about 99% of the "system specific" stuff in the
program. libsndfile will handle it correctly for you.
=MB=
--
A focus on Quality.
9:55 a.m.
On 03-Jul-2004 Christian Frisson wrote:
} Hi,
}
} I need to automate a process for slicing audio files in AIFF format on
} multiple
} files everytime perfect silences are met (zero-amplitude). This should be
} multiplatform (Linux/Mac/Win) and minimal (no GUI, only command-lines: one
} should just have to launch the script / program). The handling of standard
} UNIX
} commands like changing and listing directories, moving or renaming files...
} is
} requested.
}
} I've thought of Octave or Scilab but I couldn't find their Mac version and
} the
} AIFF file-handling wasn't that great. Alternatively, I could write a shell
} script, but I think I'd still need a piece of software to understand the
} audio
} files and determine whether it's silent or not. Sox? At last, I could write
} my
} own C software, bearing in mind it may need customizing along the OS where
} it is
} compiled...
}
} Any idea?
Regions... I'm pretty sure that each platform has a program that's capable.
Most audio editors have some sort of function.
If you search around hitsquad.com I know there's several programs that will do
this from the command line {or have little enough gui so that you could easily
run them from a script}. I don't know if they're crossplatform or not. It
looks like most of it's commercial anyway.
Snd has several functions that will do what you want and it's crossplatform.
...Maybe it's overkill though?
----------------------------------
E-Mail: RickTaylor(a)Speakeasy.Net
Date: 03-Jul-2004
Time: 06:00:18
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2:27 p.m.
New subject: [linux-audio-user] Re: AIFF files batch-slicing
Hi,
Let's get more clear: I want to turn the MIS database into multisampled
instruments. More than 700 files containing at most one full octave. The idea is
that the piece of software I'm considering should help the people from the
University of Iowa to slice the files quickly that would then be made available
as is, be granted their permission. The only remaining files to store elsewhere
(or not) would be patches, as a XML-based LinuxSampler format is on its way.
Malcolm Baldridge wrote:
Do you really mean PERFECT silence? If so, that's
a fairly trivial program
to write.
Sure. For the first step, I don't wanna waste the files, then only
zero-amplitude samples should be erased. The cross-platform and ease of use
considerations are another deal...
If you use Erik de Castro Lopo's libsndfile
<http://www.mega-nerd.com/libsndfile/>, then you can be completely freed
from having to worry about 99% of the "system specific" stuff in the
program. libsndfile will handle it correctly for you.
What's better between having the user compile a program or install one? As I
don't have a Mac around, I fear it may be easier to install a program that is
already trusted to work on these machines than to write one.
Rick Taylor wrote:
I'm pretty sure that each platform has a program
that's capable.
I hope one single will match all the three platforms. That's why I've been
thinking of scientific software which is more programming-oriented than audio
editors.
Cheers,
Christian
10:49 p.m.
New subject: [linux-audio-user] Re: AIFF files batch-slicing
Rick Taylor wrote:
} > I'm pretty sure that each platform has a program that's capable.
}
} I hope one single will match all the three platforms. That's why I've been
} thinking of scientific software which is more programming-oriented than
} audio editors.
I had the impression that this was an ongoing thing rather than a one shot.
Like it was to be part of a program or something.
My audio files run from 8 minutes to around an hour... {If it's something I
wrote this year... it's a minimum half an hour. {It's templated to some
degree.}} I have done a batch conversion of both of my audio drives {700 songs
at last count, many gigs of loops and a huge number of samples.} in 3-4 hours.
{6-8 hours in Monkeys Audio to compress them all to .ape for a backup} That
includes resampling from whatever each file is set to... to 24/48 {this last
time}, whatever dithering is necessary, probably a plugin or two, normalization,
etc...
{It's feasable that you could apply some sort of filter to the whole bunch so
as to recreate the whole library in a new and radically different form. I've
actually done this several times in the past few years simply for the sake of
seeing what I could come up with. The transformation is the least time
consuming part... You have any idea how long it takes just to audition and
organize that much audio? {Sometimes you get something intact that's as good or
better than the original... most of the time it's just an easy way to come up
with largeish samples.}}
Anyway... Once you got the settings down... regioning is about as time
consuming as opening the file and closing it. Processing time is so low as to
be irrelevant. Both Soundforge and Wavelab do batch processing {Tho' I don't
actually remember if they do regioning... It's nothing you couldn't do with a
batch file in a minute or so...} ...they'll even do autonaming and saving, etc.
Why don't you just do it or have someone with a win machine and a copy of
either program do it and get your folk to do the sorting and all of the cleanup
and optimization that you're bound to require. ...*That* will be the time
consuming part. You can easily have the files processed by morning.
----------------------------------
E-Mail: RickTaylor(a)Speakeasy.Net
Date: 03-Jul-2004
Time: 18:55:44
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4 Jul
4 Jul
7:43 a.m.
New subject: [linux-audio-user] Re: AIFF files batch-slicing
} Anyway... Once you got the settings down... regioning is about as time
} consuming as opening the file and closing it. Processing time is so low as
} be irrelevant. Both Soundforge and Wavelab do batch processing {Tho' I don't
} actually remember if they do regioning... It's nothing you couldn't do with
} batch file in a minute or so...} ...they'll even do autonaming and saving,
Sorry... that's a bit misleading... Sound Forge used to need the batch
processing system that you had to download seperately. I have no idea how they
have it implemented now.
Macromaker or Autoit or something will probably do it easier anyway.
http://www.snapfiles.com/freeware/system/fwauto.html
----------------------------------
E-Mail: RickTaylor(a)Speakeasy.Net
Date: 04-Jul-2004
Time: 04:25:42
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----------------------------------
3 Jul
3 Jul
9:26 p.m.
Hallo,
Christian Frisson hat gesagt: // Christian Frisson wrote:
I need to automate a process for slicing audio files
in AIFF format on multiple
files everytime perfect silences are met (zero-amplitude). This should be
multiplatform (Linux/Mac/Win) and minimal (no GUI, only command-lines: one
should just have to launch the script / program).
...
Any idea?
Puh, the cross-platform part is hard.
I'd suggest "pydoc wave" here, if you're into Python.
$ python
Python 2.3.3 (#2, Feb 24 2004, 09:29:20)
[GCC 3.3.3 (Debian)] on linux2
Type "help", "copyright", "credits" or "license"
for more information.
>> import wave
>> file="/tmp/hmmbaby.wav"
>> f = wave.open(file, 'r')
>> f.getnchannels()
2
>> f.getframerate()
44100
>> f.readframes(2)
'\xdd\xe9\xe8\xe2$\xeb"\xe4'
>> f.readframes(1)
'\x00\x00\x00\x00'
>> f.close()
The last frame read was silence.
Ciao
--
Frank Barknecht _ ______footils.org__
7244
days inactive
7245
days old
linux-audio-user@lists.linuxaudio.org
6 comments
4 participants
participants (4)
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RickTaylor＠Speakeasy.Net