What are “Hill and Dale” recordings, and how do I play them back?
Hill & Dale recordings are discs where the grooves move vertically instead of horizontally. Edison, for instance, cut his discs this way. In order to play Edison discs, one needs a special glass ball stylus that is 3.7-4.0 mil wide. This is available from Audio 78, among other places. Also, since the information is vertical instead of horizontal, one must rewire a stereo phono cartridge to reject the normal horizontal information and reproduce only the normally discarded vertical information. This is easily accomplished by wiring a stereo cartridge in mono, summing the channels, with one channel out of phase.
