Early 33.3 RPM and late 78 RPM Columbia Recordings from 30th Street Studio, NYC

[Craig Maier]

Early Columbia LP's and late Columbia 78s were recorded at the Columbia 30th street recording studio in NYC circa 1949 and included the original broad way cast of "South Pacific'. This recording studio was widely considered to be the best in the country at it's time (low noise and distortion and wide bandwidth). The LPs were mastered on laquer and thus the very low noise floor of their product.

NOTE: The first monophonic Columbia Microgroove LP release occurred on June 21st, 1948. It was the Violin Concerto in E Minor (ML4001) and used a grove width of 0.003 inches rotating at 33.3 RPM. Originally, these were mastered on lacquer using a 0.003 inch grove width, but the studio(s) switched over to magnetic tape circa 1949 (Magnetephon), best played with a 1.0 mil stylus.

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[Craig Maier]

The Diamond Cut Productions VPP has the ability to re-eq transfers made from RIAA or Flat to the early Columbia curve (and other EQ curves as well).

Columbia records played on an RIAA based system sound substantially different than those transferred or played using the Columbia curve. The Virtual Phono Preamp) VPP has the ability to re-eq the transfer making it sound the way that the Columbia recording engineers had intended them to sound.