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Help Recovering Capture audio files after power outage.
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resonate1
Prenoob
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Joined: 13/09/2012 14:32:16
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Location: Atlanta, GA
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I had a power outage at the end of a recording session on a computer that was not hooked up to a UPS. Therefore the session was never saved. Rebooting the computer later shows a number of wave files that I hope/presume contain the raw recorded audio up until the point of the power failure.

I am trying to recover the broadcast wave files from the unsaved session, but they appear empty when I try to open them in any DAW or editor (I've tried a half dozen).

I called tech support and asked questions like the file encoding, endianness, and offset bytes, and the poor fellow clearly had no clue what I am talking about. I also downloaded the BWF standards document in a hope that will provide me the necessary clues. While it is my personal opinion that technical support should know the answers to these questions, I am now hoping the larger Presonus community can help me out.

Has anyone ever had luck recovering files from a Presonus Capture session that was not saved due to a power outage. Your help is greatly appreciated!
-Phil G
roblof
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Joined: 12/04/2011 21:33:08
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resonate1 wrote:I had a power outage at the end of a recording session on a computer that was not hooked up to a UPS. Therefore the session was never saved. Rebooting the computer later shows a number of wave files that I hope/presume contain the raw recorded audio up until the point of the power failure.

I am trying to recover the broadcast wave files from the unsaved session, but they appear empty when I try to open them in any DAW or editor (I've tried a half dozen).

I called tech support and asked questions like the file encoding, endianness, and offset bytes, and the poor fellow clearly had no clue what I am talking about. I also downloaded the BWF standards document in a hope that will provide me the necessary clues. While it is my personal opinion that technical support should know the answers to these questions, I am now hoping the larger Presonus community can help me out.

Has anyone ever had luck recovering files from a Presonus Capture session that was not saved due to a power outage. Your help is greatly appreciated!

I've done this a couple of two or three times, but I'm not at that computer at the moment.

As you've already realized the header is missing. Using audacity to read raw files I used an offset of 2 bytes, little endian and 24-bits pcm if my memory serves me.

If this doesn't work for you I'll check my notes...

Good luck!
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resonate1
Prenoob
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Joined: 13/09/2012 14:32:16
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Location: Atlanta, GA
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roblof wrote:
I've done this a couple of two or three times, but I'm not at that computer at the moment.

As you've already realized the header is missing. Using audacity to read raw files I used an offset of 2 bytes, little endian and 24-bits pcm if my memory serves me.

If this doesn't work for you I'll check my notes...

Good luck!


THANK YOU!

I'll try this on Monday before 13:00 (GMT -5 here). I would love it if you could double check your notes, but I'll start with those.

Cheers,

-Phil

FOLLOWUP: These settings in audacity appear to work. Thank you!

This message was edited 1 time. Last update was at 19/12/2012 16:24:24

-Phil G
 
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