You will find the computers that dont work have their audio monitoring set to mono, this is often the case with laptops or smartphones.
If the audio has two tracks, left and right, with the same audio on both, if one of the tracks is phased reversed when listening in mono the sound will cancel out and you will hear nothing (or very little). If listening in stereo it will sound almost normal.
Often the cause of out of phase sound is using a balanced mono microphone into an unbalanced 3.5mm stereo jack on a camera.
... View more