"Sam Seeburg" is reminiscent of an automation system marketed by Gates in two forms, one called "Nite-Watch" and another called "Auto-Station." These primitive systems dated to the late 1950s. They consisted of a tape machine and a 100-record jukebox transport, actually made by Seeburg (the "Select-O-Matic") which played either side of a 45 rpm record vertically. It was just like the jukebox mechanism you see on the opening credits of the TV show "Happy Days" with the "turntable" traveling on rails, scanning for the selected record and playing either side with a double-sided cartridge. The Gates system one was identical except it was mounted in a gray-steel box instead of the gaudy jukebox cabinet.)
In practice what you did was, record an announcement on the tape, then push a button which generated a 25 Hz tone. The tone simultaneously stopped the tape, cueing it (loosely) up to the next event, and starting the motor of the Seeburg unit; when the record was over and the changer cycled, the turntable motor would shut off and the tape would re-start. And so forth - over and over, tape, then record, then tape, then the next record, etc. Gates literature helpfully suggested "segue is possible with about eight seconds of dead air between plays."
The 45 player was modified with relays so that when the tonearm set down on the selected record, the motor would shut off, waiting for its next command. Upon re-start there was an audio delay relay which held off the audio for about five seconds so if the pickup didn't land on precisely the appropriate beginning point, the record wouldn't "wow" in (usually.)
I once heard one of these systems on the air on a 50kw AM overnight shift, and the tape had gotten out of step with the Seeburg changer. Every time the announcer introduced the song which had jusy played previously.