However, Thomas Edison not one to give in easily hit back at Emil Berliner 3 minute recording time as he replied with a vengeance by developing the first long playing recorded disc, let it be known that Thomas Edison's long playing records used the vertical hill-and-dale for his long play fine groove The Edison's vertical hill-and-dale grooving for his long play fine groove records was in production several years before Columbia and RCA Victor's LPs even thought of developing their vinyl LP’s. It wasn’t until around 1925 that a practicable sound quality was achieved!
Knowledge of the fundamental principles was so imperfect that there was a wide margin between the original and the reproduced sound. That breakthrough came about from the telephone and communications industry. These industries had an entirely fresh approach that was copied to the phonograph which eventually solved the problems the phonograph companies were having in producing good sound quality. During the next two decades record companies offered the public different sizes and speeds of LP's, none of which could play continuous for more than 20 or more minutes!