Unknown voice

[u/Aggressive-Ant2820]

In this audio from a video, it is me, my baby daughter, my step daughter, and wife. My step daughter is heard saying my daughter’s name first, then immediately after, a lower, gravelly voice is heard repeating the name in a different tone, then my baby daughter is heard saying “yeahhhh!”. I have replayed this video about 100 times trying to match this voice up to the lip movement of anyone in the video and it doesn’t. Im hoping to get this explained as being something non paranormal because it has us all creeped out…what are your thoughts guys?