Date:         Mon, 21 Aug 2006 16:45:30 -0700
Reply-To:     Association for Recorded Sound Discussion List
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Sender:       Association for Recorded Sound Discussion List
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From:         Brandon Burke <[log in to unmask]>
Subject:      Re: File Size Confusion
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Friends,

Thanks for the replies, everyone. I'm looking forward to hearing more 
regarding converting from RF-64...

best, Brandon.

At 02:09 PM 8/21/2006, Mike Richter wrote:
>Brandon Burke wrote:
>>All,
>>I was asked to pull a 10 minute section out of a much longer file today, 
>>but am unable to open it in WaveLab. It is an 8 hour(!) recording from 
>>one of our collections, committed to digital by the donor a handful of 
>>years ago, and saved as one continuous MP3. (I know, brilliant...)
>>Here's the specs on the file...
>>File Format: MP3
>>Properties: Mono / 48.0 kHz / 64 kbps
>>Length: 8h34mn222ms
>>Size: 235.29 MB
>>What's confusing me is this: The file is 235 MB but I cannot open it 
>>because (about 65% of the way though the decoding process) WaveLab 5 says 
>>that the file exceeds the 2GB size limit.  What gives..?
>>I am able to open the file in Windows Media Player, iTunes, and other 
>>apps without an editing component BUT i obviously need to edit it in 
>>order to chop out the 10 minute section mentioned above.
>>Can anyone suggest a way to open this file in an editing app (preferably 
>>WaveLab 5)..?
>>
>>thanks as always...and apologies if this is a dumb question,
>>Brandon
>
>It's all perfectly reasonable. To open the file in an editor, it must be 
>decompressed and held in a decompressed form. Assuming that "48.0 kHz" is 
>48.0 ksps, compression to 64 Kbps is very strange indeed - about 12:1. 
>Thus, the 235 MB file will expand to nearly 3 GB within the editor and 
>that is clearly too much for the program to deal with.
>
>There is freeware to edit MP3s in simple ways such as splitting. Since I 
>do not use it, I cannot offer a recommendation except to explore the WWW, 
>try some until you find one that does not attempt to do too much and 
>therefore can/will split the file for you without expanding it.
>
>Mike
>--
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>http://www.mrichter.com/

_______________________________________
Brandon Burke
Archivist for Audio Collections
Hoover Institution Archives
Stanford University
Stanford, CA 94305-6010
vox: 650.724.9711
fax: 650.725.3445
email: [log in to unmask]