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Thread: MX 24242 power cut during recording, lost data

  1. #11
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    So, with a friend, we tried "wavfix". it did not find anything on the 0 byte wav file. I did an analysis with Recuva, he found random "wav" files erased, I retrieved this data and read with a reader and I heard sound clips with many read errors, but I do not I heard no sound corresponding to the desired content. . I think that recuva uses the disk partition table to search. In fact, I need software that reads the disk without using the partition table. Or, I need an app that can edit the partition table to make this data localizable. I do not have a program that shows me the partition table of the drive, the ones I have tried show that the contents indicated present and erased. If I can access the partition table and copy and paste the settings, I would create a similar recording project on another disk and, at the end, I would copy the partition table information to the disk containing the corumpus data. .

  2. #12
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    I know I was negative in my belief that anything can be recovered, but I am following this thread with interest as I would love to be proved wrong.

    Alan.

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    I also am skeptical that anything can be recovered, but would love to see it work out. I'm an old computer dude and have had many issues with data copies that were broken because of various reasons. The thing is, abnormally stopping a transfer, be it recording or copying a file, doesn't allow the file to be completed. Sure, you will have the file name and the zero bytes, but that's because the process began correctly. To have a contiguous file, you must have the whole file copied and the process of writing it completed, too.

    Years ago, I had a boss who was very busy and always in a rush. He was a millionaire, damn smart and a very nice guy. This was in a mortgage corporation and he was doing hedge funding. He had a formula on a white board that was six feet tall and at least 12 feet wide, of nothing but calculations. Did I say he was smart?

    Well, because he was always so busy, and always in a hurry and every file he worked on, with that formula was huge...when he saved something, it took a while for the save to complete. But, with many very smart people, they aren't always smart in all ways. He wasn't that smart in how computers work and one day, when he was in a very big hurry to catch a plane, he had just finished this file and then he hit "save".

    He immediately closed his laptop and was off to the airport. When he got to his destination, there was no file. It hadn't saved. My boss and I tried to explain to him that because the file was so large, it took a while to save from beginning to end. He had hit the save button and didn't wait for it to save the whole file. Consequently, none of it actually got saved, because the save process didn't complete.

    That's usually how computers save files. There is a beginning, where it creates the file, creates a temp file and the process begins. But, if that temp file isn't allowed to be converted to a finished file, it's the same as it never existed. Sometimes you can find bits and pieces with something similar to chkdsk, but sometimes a file isn't saved in one complete location. I would assume audio files are saved in one complete location, but still doesn't help much, if the save process never completed. I have recovered bits of text data, when power went out, and have been able to patch it back together in some cases, but audio would be a whole different process.

    Again, good luck with this as it would be interesting to know if you find something that works. All programs use their own format to create a file like a recording, and so you'd need a program that can understand the raw data of this type. Even if you are able to retrieve a recording, I wonder how good the audio would be.
    Music ~ the International Language

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    Of course, I'm sure you know, if you write anything to that hard drive, the wave files you are looking for probably won't be found. They are marked for deletion and overwriting, as far as the computer is concerned. So, if some of that file you are looking for is overwritten by another file, I doubt you'll end up finding much of anything.

    I think you said you had put in a different drive for your tests on this. This is very smart.
    Music ~ the International Language

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    yes!!!!! , I managed to find the audio. With "audacity" I imported in "RAW" the .AA image that I created with "clonzilla" of the MX2424 hard drive. "Audacity" asks me the type of audio file so I informed him saying that it is "mono" 44.1khz and 24bit. after 8 minutes of total import of the sector disk by sector I find in "audacity" a waveform in "white noise" and in some place of the zones with an audio wave. I listened in these areas and I found the audios of the whole concert. I exported as a wav file and I will have to organize this file because currently I have all the tracks by end of 3 seconds assembled. ( Like this : exemple: 0 second to 3second track1 then 0 at 3s track2 then 0s at 3 s track 3 ...etc then 3 second at 6 seconde track 1, then 3 at 6 s track 2 ect... normal because the mx writes every 3 seconds the audio of each tracks of the recordings on the hard disk and when the recording is stopped it assigns these mixed data to each of the wav files.)

    this is good news, but I have a noise quantization in the audio, and I think it comes from "audacity" because I tested by importing in "RAW" a file "wav" in exellent state located in the hard drive of my computer is I have the same noise.

    who knows why I have quantization noise even when importing a file in excellent condition?

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    Great to hear that you have recovered some audio.

    Just a note, when recording a live show it is always advisable to record in tape mode as there is less chance of fragmented wav files.

    Cheers
    Alan.

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    Hi,

    so now that I know that "Audacity" can read all the binary content of the disc through a total image of the disc, I look for why there are errors with a significant quantization noise. We can think that this is because the data is damaged, and yet I tried to import "WAV" data of the same type in perfect condition and there are also errors. I have however indicated at " audacity" the type of audio content that it is ..

    as long as the recovered audio contains white noise, it is not exploitable, so I do not need to rearrange the audio data.

    If I manage to import the audio quality I would look for a technique with 2 hard disk to try to make a finalization on audio file found and exchanged and thus have the audio reorganized naturally.

  8. #18
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    Quote Originally Posted by christubef View Post
    Hi,

    so now that I know that "Audacity" can read all the binary content of the disc through a total image of the disc, I look for why there are errors with a significant quantization noise. We can think that this is because the data is damaged, and yet I tried to import "WAV" data of the same type in perfect condition and there are also errors. I have however indicated at " audacity" the type of audio content that it is ..

    as long as the recovered audio contains white noise, it is not exploitable, so I do not need to rearrange the audio data.

    If I manage to import the audio quality I would look for a technique with 2 hard disk to try to make a finalization on audio file found and exchanged and thus have the audio reorganized naturally.
    It's a long shot but VLC offers the same raw import>save as option.
    Maybe it'll do it better?
    ---------- Steenaudio Website ----------

  9. #19
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    Hello, I tried again with "Audacity" and this time currieusement I found all the audio and in perfect quality. The mysteries of computing, strange. So I exported with "Audacity" as a .WAV file and I imported this file into the MX 2424 and then I assembled all the extracts of 2,967 seconds sets and on each corresponding tracks. that asked me 1 hour for 10 minutes of music. 1000 editions in average per hour and with an assembly to the precise audio sample. I now have my concert restored on the multitrack session and I will be able to work on the mix ..

    I also tried to do this organization by the mx 2424. I took 2 identical hard disk, one containing the unreported audio and the other on which I run an empty recording of the same duration with a project to create with the same name. Then comes the moment when I stop the recording I connect very quickly and in operation the hard drive containing unreported audio instead of the other hoping the MX 2424 writing the finalization on the disc containing the audio no listed, hoping that it organizes the files. the experiment was a failure, the MX is blocking itself.

    So I made me the re-organization in edit mode.

    the story ends well.

    Thank you for your help.
    Chris

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