(a) Elliptical stylus in a stereo groove with a sharp high-frequency modulation on one wall and a less severe waveform on the other; (b) pinch effect when hemispherical reproducing stylus travels in the varying groove formed by a plough-shaped cutting sty
Extract
(a) Elliptical stylus in a stereo groove with a sharp high-frequency modulation on one wall and a less severe waveform on the other; (b) pinch effect when hemispherical reproducing stylus travels in the varying groove formed by a plough-shaped cutting stylus
