Interesting EVP Story

I was watching TV with my grandmother one day and an old Taps episode was on so I tuned in to watch. We they were reviewing case footage and found some very clear EVPs. This caught my grandmothers interest so she asked what was going on. Once I explained what EVP's are and how they are caught, she instantly responded "that sounds like that ol record recorder I had". At that point she had my interest. She told me that she once had recorded dead air one time while making a record. Records are not reusable, and though the record was used and no good, my grandma listened to it to see what it recorded in the house. What my grandma claimed to hear were voices recorded in the record that were not hers. Now due to the fact that the old record recorders picked up any sound present, she never recorded when anyone else was home... There was no way to explain how the voices got on the recording. Once I heard this, my heart started racing. I asked her if she still had the record and/or the recorder, but after that she threw the record away and sold the recorder at her shop. I would love to get my hands on one of those!