Yes, screenshot from my Mac of a note's finder folder
Not entirely useful; the real filenames are stored as metadata in the Evernote database.
If you do an html export, the filenames will rename correctly;
I do a weekly full export as part of my backups and have access to all the audio files
>>and bulk copy all of them
You can search in Evernote for all notes containing audio files (resource:audio/*)
then select all > right-click > save atta