I recently tried to use a DR70-D for production.
I had a friend that doesn't have audio experience do the boom'd mic, but out of 45 tracks the middle 25 are blank
He says that he was able to hear audio through his headphones.
And this thing was definitely recording since I have the blank audio tracks.
What happened.. is it possible for something like this to record a track and send audio to the headphones but not actually record the audio?
I had a friend that doesn't have audio experience do the boom'd mic, but out of 45 tracks the middle 25 are blank

He says that he was able to hear audio through his headphones.
And this thing was definitely recording since I have the blank audio tracks.
What happened.. is it possible for something like this to record a track and send audio to the headphones but not actually record the audio?