Editing Stereophonic sound (section)

===Emory Cook===
In 1952, [[Emory Cook]] (1913–2002), who already had become famous by designing new feedback disk-cutter heads to improve sound from tape to vinyl, took the two-channel high-fidelity system described [[#Two-channel high fidelity and other experiments|above]] and developed a ''binaural''<ref group=note>The term "binaural" that Cook used should not be confused with the modern use of the word, where "binaural" is an inner-ear recording using small microphones placed in the ear. Cook used conventional microphones, but used the same word, "binaural", that [[Alan Blumlein]] had used for his experimental stereo records almost 20 years earlier.</ref> record out of it. This consisted of two separate channels cut into two separate groups of grooves running next to each other, one running from the edge of the disc to halfway through and the other starting at the halfway point and ending up towards the label. He used two ''lateral'' grooves with a 500&nbsp;Hz crossover in the inner track to try and compensate for the lower fidelity and high-frequency distortion on the inner track.

Each groove needed its own monophonic needle and cartridge on its own branch of the tonearm, and each needle was connected to a separate amplifier and speaker. This setup was intended to demonstrate Cook's cutter heads at a New York audio fair. It was not intended to promote the ''binaural'' process; but soon afterward, the demand for such recordings and the equipment to play them grew, and Cook's company, Cook Records, began to produce such records commercially. Cook recorded a vast array of sounds, ranging from railroad sounds to thunderstorms. By 1953, Cook had a catalog of about 25 stereo records for sale to [[audiophile]]s.<ref>"[https://books.google.com/books?id=YgoEAAAAMBAJ&pg=PA15 Commercial Binaural Sound Not Far Off]", ''Billboard'', Oct. 24, 1953, p. 15.</ref>