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Author Topic: Rescue Corrupt Wave from Olympus LS-10  (Read 597 times)

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Offline u2_fly_2

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Rescue Corrupt Wave from Olympus LS-10
« on: January 27, 2025, 01:02:29 PM »
Greetings to you all,

I once recorded a concert (back in 2019) and I got the complete concert on the internal memory of my Olympus-LS 10 digital recorder...when I came back home and wanted to process the recording it was corrupt.

I tried several different back up and recovery tools but for some reason I only managed to save the first 5 minutes of the recording...

Leading to my question:
Is there any tools of today that perhaps can save/rescue the complete recording or is it doomed for real?

Cheers for any thoughts on this matter...:cheers:
Soundprofessionals Audio Technica AT 943 (SP-CMC-8) External Stereo Microphones > SP-SPSB-10-80020
Sound Professionals Micro-mini microphone power supply with mini 12vdc battery and 24 inch hardwired output cable Soundprofessionals Batterybox >> Olympus Ls-10 Linear Recorder > 4 GB > 24 Bit / 48 Khz  > 24 Bit / 96 Khz

Zoom Q3 HD - 1080p / 96-24 Bit

Roland R-26 (96 / 24 Bit)

Sony PCM-D100 (192 / 24 Bit)

Offline one8ung

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Re: Rescue Corrupt Wave from Olympus LS-10
« Reply #1 on: January 27, 2025, 02:42:34 PM »
Can you save the corrupt file to your harddisk?
If yes how big is it?
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Offline TheJez

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Re: Rescue Corrupt Wave from Olympus LS-10
« Reply #2 on: January 28, 2025, 02:22:47 AM »
It depends a bit on what is corrupt. Is it the audio or header data inside your WAV-file? Or is the WAV-file itself corrupt in the filesystem on your Olympus?

Once I was cought recording at the end of the show and was forced to format the SD-card on the spot. What I did afterwards was this:
- Put the SD card in a laptop (where it showed up completely empty of course)
- Created a disk image of the SD card. There are several tools that can do that, e.g. https://www.osforensics.com/tools/write-usb-images.html. By copying the disk image instead of the WAV-files on the SD card (or internal memory), any filesystem errors are bypassed.
- Opened the disk image as 'raw audio file' in your favorite editor, using the parameters of your audio file. E.g. in my case it was stereo 24bit 96kHz. I had to play a bit with 'offset' (0,1,2 bytes) to make the editor parse the samples correctly.
This gave me the full recording, apart from a few corrupted samples at the very start of the show. These small parts were header data or re-written during the formatting process.

This only works if you haven't used your recorder or SD card for anything else since the mishap. Otherwise the samples in the storage have likely long been overwritten with new data. As yours was back in 2019, I guess you have been using it since, so this very likely won't work anymore.
Hence one8ung's questions are very valid: If your WAV file is small, then it likely contains just the 5 minutes of audio. If it is big, the samples beyond 5 minutes may be there but unreachable due to header corruption. Opening the file as 'raw audio' in your editor then might save your day.

If you'd need any assistance trying to rescue your recording, I'd be happy to offer my help.
« Last Edit: January 28, 2025, 02:25:33 AM by TheJez »

Offline u2_fly_2

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Re: Rescue Corrupt Wave from Olympus LS-10
« Reply #3 on: January 28, 2025, 11:00:33 AM »
Can you save the corrupt file to your harddisk?
If yes how big is it?


I can not, no...the file appears to be 1.9 gb recorded in 24/48-bit.
Soundprofessionals Audio Technica AT 943 (SP-CMC-8) External Stereo Microphones > SP-SPSB-10-80020
Sound Professionals Micro-mini microphone power supply with mini 12vdc battery and 24 inch hardwired output cable Soundprofessionals Batterybox >> Olympus Ls-10 Linear Recorder > 4 GB > 24 Bit / 48 Khz  > 24 Bit / 96 Khz

Zoom Q3 HD - 1080p / 96-24 Bit

Roland R-26 (96 / 24 Bit)

Sony PCM-D100 (192 / 24 Bit)

Offline u2_fly_2

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Re: Rescue Corrupt Wave from Olympus LS-10
« Reply #4 on: January 28, 2025, 11:02:58 AM »
It depends a bit on what is corrupt. Is it the audio or header data inside your WAV-file? Or is the WAV-file itself corrupt in the filesystem on your Olympus?

Once I was cought recording at the end of the show and was forced to format the SD-card on the spot. What I did afterwards was this:
- Put the SD card in a laptop (where it showed up completely empty of course)
- Created a disk image of the SD card. There are several tools that can do that, e.g. https://www.osforensics.com/tools/write-usb-images.html. By copying the disk image instead of the WAV-files on the SD card (or internal memory), any filesystem errors are bypassed.
- Opened the disk image as 'raw audio file' in your favorite editor, using the parameters of your audio file. E.g. in my case it was stereo 24bit 96kHz. I had to play a bit with 'offset' (0,1,2 bytes) to make the editor parse the samples correctly.
This gave me the full recording, apart from a few corrupted samples at the very start of the show. These small parts were header data or re-written during the formatting process.

This only works if you haven't used your recorder or SD card for anything else since the mishap. Otherwise the samples in the storage have likely long been overwritten with new data. As yours was back in 2019, I guess you have been using it since, so this very likely won't work anymore.
Hence one8ung's questions are very valid: If your WAV file is small, then it likely contains just the 5 minutes of audio. If it is big, the samples beyond 5 minutes may be there but unreachable due to header corruption. Opening the file as 'raw audio' in your editor then might save your day.

If you'd need any assistance trying to rescue your recording, I'd be happy to offer my help.


Thank you very much for all of the input in this matter...I will try what you suggested...I have two equal LS-10 recorders, so it might be worth to give it another try with the old one :cheers:
Soundprofessionals Audio Technica AT 943 (SP-CMC-8) External Stereo Microphones > SP-SPSB-10-80020
Sound Professionals Micro-mini microphone power supply with mini 12vdc battery and 24 inch hardwired output cable Soundprofessionals Batterybox >> Olympus Ls-10 Linear Recorder > 4 GB > 24 Bit / 48 Khz  > 24 Bit / 96 Khz

Zoom Q3 HD - 1080p / 96-24 Bit

Roland R-26 (96 / 24 Bit)

Sony PCM-D100 (192 / 24 Bit)

Offline TheJez

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Re: Rescue Corrupt Wave from Olympus LS-10
« Reply #5 on: February 04, 2025, 01:10:33 PM »
Can you save the corrupt file to your harddisk?
If yes how big is it?


I can not, no...the file appears to be 1.9 gb recorded in 24/48-bit.

Interesting, that file then should contain about 110 minutes of audio. But as you can't seem to be able to copy it to your harddisk, it seems the file system is corrupt. I'd suggest to try to make a disk image (hence ignoring any file system on it) and then open that disk image as 'raw audio'. You may need to try offset of 0, 1 or 2 before you get the right samples.

Offline u2_fly_2

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Re: Rescue Corrupt Wave from Olympus LS-10
« Reply #6 on: February 11, 2025, 08:07:45 AM »
Can you save the corrupt file to your harddisk?
If yes how big is it?


I can not, no...the file appears to be 1.9 gb recorded in 24/48-bit.

Interesting, that file then should contain about 110 minutes of audio. But as you can't seem to be able to copy it to your harddisk, it seems the file system is corrupt. I'd suggest to try to make a disk image (hence ignoring any file system on it) and then open that disk image as 'raw audio'. You may need to try offset of 0, 1 or 2 before you get the right samples.


Thank you, I´ve tried that but no luck sadly...but many thanks for all of your input in this matter. I appreciate it, cheers :cheers:
Soundprofessionals Audio Technica AT 943 (SP-CMC-8) External Stereo Microphones > SP-SPSB-10-80020
Sound Professionals Micro-mini microphone power supply with mini 12vdc battery and 24 inch hardwired output cable Soundprofessionals Batterybox >> Olympus Ls-10 Linear Recorder > 4 GB > 24 Bit / 48 Khz  > 24 Bit / 96 Khz

Zoom Q3 HD - 1080p / 96-24 Bit

Roland R-26 (96 / 24 Bit)

Sony PCM-D100 (192 / 24 Bit)

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