Can a recording from a messaging app be examined?
A preliminary assessment is possible, but compression and forwarding may limit the conclusions. Preserve the source file.
Can editing be detected?
This depends on the recording's properties and the availability of the source file; failure to detect signs does not always confirm that it is unchanged.
Does the device need to be handed over?
It depends on the assignment: a file is sufficient for some questions, while others require the storage medium or device.
Will the recording be suitable for voice comparison?
This is assessed from the quality, duration and availability of suitable comparison samples.
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