If this is your first page of entry please head for the start and read the articles in order! With all the discussion about 78rpm turntables. Does anyone know why the RPM rates for the various record sizes were chosen? For example; "does 78 RPM represent the best compromise speed at the time using the available technology at the time to achieve reasonable frequency response?" 78rpm speed dating back from the early Thomas Alva Edison's invention of the phonograph in 1877 leading unto the Victor Company relating to revolutionize non-standard speeds in the initial stages of early recording discs on changing their variation of speeds to an organised standard. Visitors to this web site have been requesting information on the non-standard RPM of the early sound recording. In my infinite wisdom I have duly obliged with an explanation of how it was before a uniformed standardised idea became worldwide absolute throughout the recording industry. In the early days there was no specialized standards relating to rpm for recording for sound recordings and it was notable that there were speeds as low as 16 rpm and diameter ranging from 7 inches to 16 inches. There was recordings with speeds of 84 rpm and as high as 100 rpm, discs played at speeds varied above the generally led to believed 70 rpm. | 
