I did read the specs, and they don't answer any of my questions. This comment fails to give me any new information and instead just makes me feel bad, so, congratulations, if that was your goal.
"a camera's running speed is locked to the digitally divided oscillations of a quartz crystal, with an accuracy of a few parts per million. The function of the pilot cable was to feed a representation of the camera's speed to the recorder. Since with crystal control that speed is precisely known, the cable can be replaced by a similarly accurate crystal generator mounted in the audio recorder. This eliminates any connection between camera and recorder, but permits them to stay in sync with each other. A pilot signal is recorded as above, but it comes from the built-in crystal instead of the camera. The resulting tape is resolved to mag film just the same as a pilot tape. You still need a clapper board for a start mark."
So, it doesn't actually record the sound, but it is capable of being sync'd to the recording of the sound.
"a camera's running speed is locked to the digitally divided oscillations of a quartz crystal, with an accuracy of a few parts per million. The function of the pilot cable was to feed a representation of the camera's speed to the recorder. Since with crystal control that speed is precisely known, the cable can be replaced by a similarly accurate crystal generator mounted in the audio recorder. This eliminates any connection between camera and recorder, but permits them to stay in sync with each other. A pilot signal is recorded as above, but it comes from the built-in crystal instead of the camera. The resulting tape is resolved to mag film just the same as a pilot tape. You still need a clapper board for a start mark."
So, it doesn't actually record the sound, but it is capable of being sync'd to the recording of the sound.