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Section 8: Reference
JBL RMC™ Room Mode Correction:
About RMC
The biggest challenge for anyone producing audio is creating a mix that sounds
great on all playback systems. If you think of a monitoring system as a kind of "lens"
through which you hear sound, the object is to have the lens be crystal-clear and
transparent so that it imparts no coloration whatsoever to the signal being played
back. However, every loudspeaker system, no matter how well designed, interacts
with the room in which it is installed. Lack of correct acoustic treatment (or, worse
yet, lack of any treatment at all) can result in anomalies such as low-frequency
"standing waves"—the aural equivalent to the lens being "smeared." Trying to
create a mix in such an environment can be as frustrating and difficult as trying to
paint a masterpiece while blindfolded.
JBL’s exclusive RMC Room Mode Correction technology is designed to solve the
problem. It uses the power of your computer to analyze the acoustic conditions of your
room RMC then compensates for low frequency inaccuracies in the listening space
by having the MSC1 precisely insert filters so that signals arrive at the mix position
with the intended frequency response. By making precise corrections, RMC allows
you to create reliable mixes that translate to any environment. Space limitations in
the work environment may prevent ideal positioning of the Left and Right speakers
and subwoofer. The MSC1 allows you to precisely trim the level of each connected
speaker, and apply delay to compensate for differences in placement relative to the
mix position, ensuring balanced mixes regardless of speaker placement.
Performing an RMC Calibration
The supplied MSC1 Control Center software, MSC1 Calibration Microphone, and
accessory cables are required to perform an RMC calibration. Refer to the supplied
MSC1 Control Center Software Users Guide for full instructions.
Subwoofer Bass Management Crossover
Adding a subwoofer to your system will extend the frequency response of
the main speakers. "Bass management" is a term that refers to the practice of
removing bass signals from the Left and Right speakers and sending them to the
subwoofer. Because of the physiology of the human ear, low frequencies are largely
non-directional: given an adequate listening distance, we can’t easily tell where
bass signals are coming from. Thus, it makes little or no difference to the listening
experience whether the bass component of a sound comes from the Left or Right
channel speaker or from a dedicated subwoofer which is better equipped, and better
positioned in the room, to reproduce low frequencies than even a full range monitor.
Beyond the fact that a subwoofer is designed for the optimal reproduction of low
frequencies, bass management can also be used to solve acoustic problems in a
room: having all the low frequency signals come from a single source can eliminate
low frequency phase cancellation that occurs when the same low frequency signal
is reproduced by multiple speakers. The MSC1 SUB Control allows you to easily
enable or disable the Subwoofer and Bass Management system.
Содержание MSC1
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