Acoustic Lexicon

A ninety-degree V-shaped trough cut into the disc face. Left and right channel signals are cut forty-five degrees from vertical onto opposing groove walls. Typical width measures approximately twenty-five microns.

The smooth mirror field extending between the terminal audio cut and the center paper label. Contains hand-etched matrix numbers, stamper revision codes, and mastering engineer initials.

The original, unmodulated flat vinyl plane separating adjacent groove spirals. Superficial paper hairlines that lie strictly on the land produce no audible clicks during stylus tracking.

A continuous closed circular groove at the innermost radius of the disc. Captures the tonearm and prevents the stylus from colliding with the abrasive paper label.

An archival packaging method where separately printed paper sheets wrap around heavy, dense chipboard cores. Resists corner dings, seam tears, and shelf warp transference.

The industrial metal reproduction hierarchy. The master lacquer yields a silver-coated father plate, which generates positive metal mothers. Nickel stampers are pressed from mothers to stamp finished records.

A miniature hollow tube made from aluminum, boron, or sapphire. Transmits physical mechanical vibrations from the diamond stylus tip into magnetic generator coils seated inside the cartridge body.

Moving Magnet cartridges attach tiny magnets to the vibrating cantilever between stationary copper wire coils. Moving Coil cartridges reverse this geometry, reducing moving tip mass but requiring higher-gain preamps.

The gravitational downward force exerted by the tonearm onto the diamond tip. Correct VTF keeps the diamond seated firmly against both groove walls without crushing suspension elastomer dampers.

A calibrated outward lateral force applied at the tonearm pivot. Counteracts friction-induced centripetal pull, balancing stylus contact pressure evenly between inner and outer groove walls.

The angle formed between the cantilever axis and the record surface plane. Setting tonearm pivot height parallel to the disc ensures that the stylus mirrors the cutting lathe cutter head angle.

A global standard frequency equalization curve. Bass frequencies are attenuated twenty decibels during cutting to prevent wide groove swings. Phono preamps restore low frequencies and attenuate treble during playback.