M2tech – M2TECH Joplin User Manual

Page 35

JOPLIN
384

/32bit ANALOG-TO-DIGITAL CONVERTER

REVISION P

B – SEPTEMBER 2012

M2Tech

www.m2tech.biz

9.2.10. NAB

NAB (National Association of Broadcasters) was founded by commercial radio companies
to address many aspects of their activity. Amongst these, the technical issue related to
broadcasting. NAB proposed a phono curve to be used for the records which were made
at the time especially for broadcasting, with live and rare recordings of famous artists. The
record collector who own these records should use this curve to play them.

9.2.11. Oiseau-Lyre (OYLR)

Before being purchased by Decca, Oiseau-Lyre made many great recordings of classical
music.

9.2.12. Pacific Jazz (PACJ)

Jazz was a great business in USA after WWII, so some specialized labels chose to
develop their eq curves to press their microgroove LP’s. Pacific Jazz was one of them.

9.2.13. Philips

Of course, Philips, one of the greatest European brands related to music, developed its eq
curve.

9.2.14. RCA (RCA1, RCA2 and RCAO)

RCA developed many equalization curves, to be used with her 45rpm’s and, later, for the
microgroove LP’s after losing the format war against Columbia, so it’s difficult to say which
curve was used for a certain record. The Joplin offers three choices, based on record’s
year of cutting. RCA1 is the oldest. The newest, RCA Orthophonic, is the one on which the
“New Orthopohonic” was developed, thus leading to RIAA.

9.2.15. Brunswick

Brunswick is a very old record company who mainly produced 78rpm’s. The curve offered
with the Joplin is the one used for the 78rpm’s.

9.2.16. Columbia 1925, Columbia 1938 and Columbia England (CO25, CO38
and COLE)

Columbia was very active cutting 78rpm’s before introducing the microgroove LP. She
used different curves in different years: one between 1925 and 1938 and one from 1938