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Question

Zipping .wav files without compression

Apr 4, 2015 5:47AM PDT

Hello. Here's is what someone wants me to do to a large group of .wav files:

"You Zip up all the files into one zip file and select 'STORE' as the option"

Do you know what he means? If I select and right-click a group of .wavs, I have the option to Send to Compressed (zipped) folder. However, he states later that he does not want any compression whatsoever and that size of the "zip file" should equal the sum of the sizes of each .wav file.

Running Windows 8.1.

Thanks.

Discussion is locked

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Answer
Then you won't be using the right click.
Apr 4, 2015 5:50AM PDT
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Answer
Re: zip
Apr 4, 2015 7:15AM PDT

What he asks is to use an option in 7zip (free download). "Store" is one of the formats supported by that program if it compresses the files and means 'no compression'. So just do what he asks, after downloading that program from http://www.7-zip.org/download.html and installing it.

But that does not mean that the size of the output file equals the sum of the sizes if the input files. I just checked it, and if you don't believe me you can easily check it yourself. Just make 2 files of 0 bytes and zip them using this method. With me, the resulting file was 286 bytes. Makes sense. YMMV.

Kees

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Answer
I downloaded it
Apr 5, 2015 12:29AM PDT
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Re: settings
Apr 5, 2015 1:17AM PDT

I didn't it. And I don't read in the instructions in your first post that you were required or requested to do so.

Kees

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Folk want a lot of options.
Apr 5, 2015 2:17AM PDT

Since you are the user, you set those as you see fit.
Bob

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no compression
Apr 5, 2015 3:48AM PDT

Thanks. I know, but I I just wanted to make sure no compression was taking place.

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Store sounds right.
Apr 5, 2015 4:11AM PDT

But as Kees pointed out there may be more bytes than before. Are you new to the topic of lossless compression?
Bob

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Yes, I'm a newbie
Apr 5, 2015 5:54AM PDT

Yes. I am zipping my session files of a song I record with digital audio workstation software (Studio One). The mixer requested that I ""You Zip up all the files into one zip file and select 'STORE' as the option," as I stated in my first post. Based on your recommendation, I downloaded 7zip and chose Store. But there were a couple of other drop down menus that were not blank as the image above shows.

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Each area is your choice.
Apr 5, 2015 5:59AM PDT

Defaults are usually fine. Since you have "Store" that gives you the no compression option. Strange choice since this is lossless compression. Can't imagine who would use that but if they demand it, why not?
Bob

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Re: compression
Apr 5, 2015 4:12AM PDT

How much bytes are source files together?
How much bytes is the zip file?
Is it more, equal or less? Then maybe you're convinced.

Now an interesting assignment: find out how the receiver of the zip file will check if the files are uncompressed as he asks you.


Kees

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Here are the numbers
Apr 5, 2015 5:58AM PDT

File size of the .7z is 745 MB.

File size of the two folders that I zipped is 745 MB.

File "size on disk" of the two folders that I zipped is 747 MB.

Hope that helps. Thanks.

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So it seems uncompressed.
Apr 5, 2015 6:13PM PDT

After all: 745 = 745.

What does 7-zip say about the compression factors of the files included if you open that zip-file?

Kees

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I think you're right
Apr 8, 2015 3:49PM PDT

Yes, it seems like "Store" does not compress. What is more, you can save them as zip files as opposed to 7z, which makes them easier for people to open. Pretty happy with the answers I got on here. Thanks.