We have a Olympus VN-7800 that we need to recover deleted recordings from. We went down the avenue of a Chip-Off recovery and obtained a full binary dump of the 4GB BGA169 chip.
Looking at the data in Hex, 90% of the chip is zeros which isn't good to start with. There are unusual filetypes in four folders on a FAT32 partition.
A portion of the folder structure is:
RECORDER\
RECORDER\FOLDER_A\
RECORDER\FOLDER_A\INDEX.DAT
RECORDER\FOLDER_A\VOC_110101-0004.AAE
RECORDER\FOLDER_A\VOC_110103-0008.AAI
RECORDER\FOLDER_A\VOC_110104-0009.AAJ
RECORDER\FOLDER_A\VOC_110106-0016.AAQ
RECORDER\FOLDER_A\VOC_110110-0018.AAS
RECORDER\FOLDER_A\VOC_110111-0019.AAT
RECORDER\FOLDER_A\VOC_110113-0020.AAU
We have tried to load some of these files into Audacity as raw data but none of these files play and are simply noise. The filetypes seem to be random (or incrementally generated) too, so is there any help or advice anyone can give with this?
We need to be able to play the files from the dump but this is the part we are having trouble with.
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