I am not sure what the accent of なんの意味もない would become.
I would guess it would be な\んの・い\みも・な\い. Because なんの is な\んの by itself (see comments for this particular audio).
- In this audio, I think it becomes なんの ̄・い\みも・な\い.
- In this audio, I think it becomes なんの ̄・い\みも・な\い
- This sounds different, but I would still interpret it as なんの ̄・い\みも・な\い
Does this happen or am I mishearing those?