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Q: Splitting MP3 files: ( Answered,   0 Comments )
Subject: Splitting MP3 files:
Category: Computers > Software
Asked by: sherpaj-ga
List Price: $6.00
Posted: 21 Dec 2002 02:03 PST
Expires: 20 Jan 2003 02:03 PST
Question ID: 132099
I am converting some of my audiobooks and vinyl records to MP3 files. 
 The problem is that the MP3 files I generate are anywhere from 45
minutes (for records) to 6 hours (for books).   It makes it very hard
to listen to these on a MP3 player because it is hard to browse the
different sections or songs when the device treats the recording as
one big song.

I know there are tons and tons of windows programs to split a big MP3
file into smaller MP3 files.  I need one that can sense the silence
between songs (or between book chapters) to pick where to split the
file.   The program also needs to be easy to use.
Subject: Re: Splitting MP3 files:
Answered By: seizer-ga on 21 Dec 2002 03:53 PST
Hello sherpaj!

I believe I've found a few solutions for you. They all have one thing
in common however, in that they only split the WAV file that you
originally copy from the LP, not the MP3 itself. The reason for this
is that MP3 is a "lossy" format - it loses some of the data that gets
copied from the LP. Thus, silence detection becomes much more
difficult for software to do with MP3s.

So the bad news is that you will need to re-copy some of the LPs and
audiobooks you already encoded. But the good news is that there is
some excellent software out there to do the task:

AudioMagic, by YoGen
Price: $15

AudioMagic is a simple utility which can split tracks read in from LP,
cassette, or other medium. It has configurable silence detection built
in. A download trial version is available.

mp3DirectCut, by mpesch3
Price: Free

mp3DirectCut is free, and as such, has no silence detection built in.
But it appears to be very easy to use to manually split the mp3s, as
it shows you a sound visualization.

CD Wave, by Milo Software
Price: $15

Another WAV splitter, with silence detection. Additionally, it lets
you add or amend split points, if you feel it has not detected them
correctly (a serious issue on noisy, poppy LPs). The full version is
available for download; purchasing is optional.

AudioSeperator, by Carl Youngblood
Price: $14.95

Yet another WAV splitter, with user configurable silence detection. A
trial version is available for download.

I hope this helps, and is what you were looking for. If anything's
unclear, or requires a bit more explanation, then please don't
hesitate to request clarification before rating this answer!

P.S. If you originally copied the LPs straight to MP3, and your
program doesn't support copying to WAV, then try the excellent (and
free) CDex, from:

Best of luck with your MP3 creation,


Search strategy on both Google and Google Groups:

mp3 file splitter
mp3 splitter "silence detection"
audio file splitter

Request for Answer Clarification by sherpaj-ga on 23 Dec 2002 23:38 PST
So here is the plan, I guess.   

1 - Convert my long MP3 files into long wav files
2 - Split the long wav files using one of the programs you found
3 - Reencode the groups of split wavs back into MP3.

What program can I use to "batch" this last step.  Of the audiobooks,
there could be 20 chapters, so that is 20 wav files that need to be
batch encoded into 24k, 16bit, mono MP3 files.

Can you recommend such an encoding program?

Clarification of Answer by seizer-ga on 24 Dec 2002 03:06 PST
Certainly I can recommend something for step 3!

Firstly, get hold of an MP3 encoder called LAME - it's far and away my
favourite in terms of quality and speed - although it does need a
little help as far as ease of use, so make sure to read the "Usage"
help file. (the first link to LAME stable)

After you've unpacked that, click Start / Run and type "command", and
hit enter.

Then type:

cd \folder\where\your\wav\files\are [Hit the ENTER key]
for %x in (*.wav) do lame -b 24 %x %x.mp3 [Hit the ENTER key]

This should convert all the WAV files in that folder to MP3s. You may
wish to tweak the options you give the Lame encoder (here, I've used
"-b 24" to set the bitrate to 24kbps, but there are many more options

Hope this helps, and if you're in a part of the world right now which
is enjoying a holiday, all the best for that!


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