I was trying to explain silent movies to my kids, and I realized it didn& #39;t make any sense to me. They had a phonograph at the time; why not just sync that up? It would take finesse, like syncing a RiffTrax with a DVD, but you assume people would hack it.
                        
                        
                        
                        
                                                
                    
                    
                                    
                    
                    
                
                 
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