wav file length discrepancy

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Guest

I was sent a PPS file that included 30 slides and a wav file. The total size
of the show is 2.67 MB. The wav file was short in play time (1 min 20 sec)
and terminated abruptly, paused, and then played again. Not liking the way it
was done, I played the show and captured the music with Audacity, then
exported it as a monaural wav file to keep is small. The size of that file
alone turned out to be 6,951 KB or 6.79 MB which is almost three times as
large as the original file including the slides. I didn't at first notice
this, and proceded to make adjustments.

By the time I doubled the length of the wav file via cut and paste, and gave
it a much more appropriate ending by the same method, the play time was
extended to 2 min 51 sec. I set the slides to change automatically to match
the final music length, and suddenly the PPS file was 46.1 MB -- up from
2.67. WOW!

Can anyone tell me how the size of the included wav file can be larger than
the original PPS itself? Clearly I haven't a clue about what's going on here.

Any help would be most appreciated. Thanks.
 
Not all wav files are created equal.

If you the original wav was mono at low quality and you edited it and saved
it to stereo at highest fidelity (48 kHz, 16 bit), the result might be 25-30
times larger even if it is the exact same length. Granted this is an
extreme example, but it illistratrates what often happens.

Check the settings the sound wav file had first. If you do not know how to
check this info, just right click on the file and select properties. Many
times, wav files being sent are formatted to a reduce their file size by
changing the default save as settings.


--
Bill Dilworth
A proud member of the Microsoft PPT MVP Team
Users helping fellow users.
http://billdilworth.mvps.org
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
vestprog2@ Please read the PowerPoint FAQ pages.
yahoo. They answer most of our questions.
com www.pptfaq.com
..
 
Thank you very much, Bill. I have searched the original PPS to find the music
icon on slide #1, but can't find it in normal view. The only way I was able
to identify the file at all was in the Slide Transistion area. So I don't
have a clue as to where the original file is stored. It seems to be one area
that could use improvement in PowerPoint -- easier access to the sound file.

Do you have any suggestions on how to go about finding it? I seem to recall
reading that it's possible to drag the sound icon off the slide altogether to
hide it. Perhaps that's what the fellow did.

Thanks again.
--
Norm Shimmel
Butler, PA


Bill Dilworth said:
Not all wav files are created equal.

If you the original wav was mono at low quality and you edited it and saved
it to stereo at highest fidelity (48 kHz, 16 bit), the result might be 25-30
times larger even if it is the exact same length. Granted this is an
extreme example, but it illistratrates what often happens.

Check the settings the sound wav file had first. If you do not know how to
check this info, just right click on the file and select properties. Many
times, wav files being sent are formatted to a reduce their file size by
changing the default save as settings.


--
Bill Dilworth
A proud member of the Microsoft PPT MVP Team
Users helping fellow users.
http://billdilworth.mvps.org
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
vestprog2@ Please read the PowerPoint FAQ pages.
yahoo. They answer most of our questions.
com www.pptfaq.com
..
Click to expand...
 
Simply save the presentation as an HTML file (There is a pull down list in
the Save As dialog that allows you to select the file type you want to save
the presentation as). In the resulting folder, you will find the sound
file.

Of course, since you did not build this presentation, I have to say that you
should always get the authors permission before using any of their work in
your own presentations.


--
Bill Dilworth
A proud member of the Microsoft PPT MVP Team
Users helping fellow users.
http://billdilworth.mvps.org
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
vestprog2@ Please read the PowerPoint FAQ pages.
yahoo. They answer most of our questions.
com www.pptfaq.com
..

NES said:
Thank you very much, Bill. I have searched the original PPS to find the
music
icon on slide #1, but can't find it in normal view. The only way I was
able
to identify the file at all was in the Slide Transistion area. So I don't
have a clue as to where the original file is stored. It seems to be one
area
that could use improvement in PowerPoint -- easier access to the sound
file.

Do you have any suggestions on how to go about finding it? I seem to
recall
reading that it's possible to drag the sound icon off the slide altogether
to
hide it. Perhaps that's what the fellow did.

Thanks again.
Click to expand...
 
Bill, again I am in your debt. Thank you very much for such swift replies.

I'm changing this file strictly for my own entertainment and perhaps for a
few friends. It's also one way of learning what I can do with all these
programs. This is the first time I've ever altered sound in a presentation,
though I've used sound in my own. As it is in the humungous file, it's much
nicer to watch and listen to than the original. If I knew who did it, I'd
send him/her a copy.
 
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