JOPLIN MKIII
384
k
H
z
/32bit ANALOG-TO-DIGITAL CONVERTER
REVISION P
R
A – APRIL 2019
Copyright © 2019, M2Tech Srl
42
M2Tech
www.m2tech.biz
9.2.10. MGM
The famous entertainment company also produced LP’s during the mono era using her
proprietary curve.
9.2.11. 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.
9.2.12. Oiseau-Lyre (OYLR)
Before being purchased by Decca, Oiseau-Lyre made many great recordings of classical
music.
9.2.13. 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.
9.2.14. Philips
Of course, Philips, one of the greatest European brands related to music, developed its eq
curve.
9.2.15. 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 MKIII
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.
