WAV to MP3 Conversion Puzzle!!!

Hi,

I have been recording music from LP records using "AIPL Singulator" which
creates WAV files. This software has features designed for LP records.

Then I use "Free Converter" V1.5.0 by Renan Broquin to convert the WAV
files to MP3. I used these programs on two Windows 98SE computers (Compaq
and Toshiba) that basically have the same software installed such as Media
Player V9, etc.

As a test, I transferred a copy of a particular WAV file to the Compaq
computer, and made a MP3 file of it so I could compare it with the one from
the Toshiba computer. It turns out they are not the same! The length of the
files are the same, but byte for byte, there are some differences. Listening
to the MP3 files, it is hard to tell any difference. Why does
"Free Converter" create an MP3 file of the exact same WAV file, but on a
different computer, that isn't exactly the same MP3 file?

Thanks in advance, Brad

Before you type your password, credit card number, etc.,
be sure there is no active keystroke logger (spyware) in your PC.

sampling rates(?) vary converting the wave file to mp3, the faster pc
processes the information mildly faster than the slower one. thereby reading
a different portion of the waveform at each step, the compression rate is
set so the final file size is the same

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"Brad" wrote in message
...
Hi,

I have been recording music from LP records using "AIPL Singulator"
which
creates WAV files. This software has features designed for LP records.

Then I use "Free Converter" V1.5.0 by Renan Broquin to convert the WAV
files to MP3. I used these programs on two Windows 98SE computers
(Compaq
and Toshiba) that basically have the same software installed such as Media
Player V9, etc.

As a test, I transferred a copy of a particular WAV file to the
Compaq
computer, and made a MP3 file of it so I could compare it with the one
from
the Toshiba computer. It turns out they are not the same! The length of
the
files are the same, but byte for byte, there are some differences.
Listening
to the MP3 files, it is hard to tell any difference. Why does
"Free Converter" create an MP3 file of the exact same WAV file, but on a
different computer, that isn't exactly the same MP3 file?

Thanks in advance, Brad

Before you type your password, credit card number, etc.,
be sure there is no active keystroke logger (spyware) in your PC.

On Tue, 21 Nov 2006 13:09:18 GMT, (Brad) put
finger to keyboard and composed:

Hi,

I have been recording music from LP records using "AIPL Singulator" which
creates WAV files. This software has features designed for LP records.

Then I use "Free Converter" V1.5.0 by Renan Broquin to convert the WAV
files to MP3. I used these programs on two Windows 98SE computers (Compaq
and Toshiba) that basically have the same software installed such as Media
Player V9, etc.

As a test, I transferred a copy of a particular WAV file to the Compaq
computer, and made a MP3 file of it so I could compare it with the one from
the Toshiba computer. It turns out they are not the same! The length of the
files are the same, but byte for byte, there are some differences. Listening
to the MP3 files, it is hard to tell any difference. Why does
"Free Converter" create an MP3 file of the exact same WAV file, but on a
different computer, that isn't exactly the same MP3 file?

Thanks in advance, Brad

Is the difference in the content or in the headers?

Is the file's creation date/time recorded in the header block?

Can you make identical copies on the same machine?

FWIW, I would use the following DOS command line to compare two binary
files:

fc /b file1.mp3 file2.mp3

You can write the differences to a file as follows:

fc /b file1.mp3 file2.mp3 diffs.txt

I'd experiment with the small WAV files in the Windows\Media
directory, eg chimes.wav.

You could use the following DOS command line to view a file:

edit /r /64 file.mp3

- Franc Zabkar
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