A theoretical study of the physical factors which limit the maximum peak velocity over the usable frequency range in disk recording shows there are three regions involved. At low frequencies amplitude is the controlling factor, at intermediate frequencies the geometrical shape of the cutting stylus limits the velocity, and at high frequencies the tip radius of the reproducing stylus becomes the limiting factor. These geometrical parameters are then related to the capabilities of the Westrex 3C StereoDisk recorder at various speeds.
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