Manual

LM2 (optional)
Loudness Pilot English Manual (2014-10-07) 97
LM2 – Introduction
The LM2 Loudness Radar Meter algorithm
can measure loudness at the input stage as
well as the output stage of Loudness Pilot.
It shows the user the essence of the “loudness
landscape” at a glance for a complete and in-
stant overview, including:
►
Loudness History
►
Momentary Loudness
►
True-peak Level
►
Program Loudness and
►
Loudness Range
–
all this in a single view.
LM2 also features a detailed 24/7 logging func-
tion that will generate a text file which you can
use to document adherence to a specific broad-
cast standard. In fact, you get two independent
sets of log files – one for each LM2 instance.
LM2 is an optional license. For more informa-
tion, see “Extending your product’s capabilities
with optional licenses” on page 121.
What is LM2?
LM2 represents a quantum leap away from sim-
ply measuring audio level to measuring per-
ceived loudness.
The old level method is responsible for unac-
ceptable level jumps in television, for music CDs
getting increasingly distorted, and for different
audio formats and program genres becoming in-
compatible: Pristine music tracks from the past
don’t coexist with new recordings, TV commer-
cials don’t fit drama, classical music or film and
broadcast don’t match. The most fundamental
audio issue of all – control of loudness – makes
millions of people adjust the volume control over
and over again, every day.
LM2 is part of a universal and ITU standard-
ized loudness control concept, whereby audio
may easily and consistently be measured and
controlled at various stages of production and
distribution. LM2 works coherently together with
other TC equipment, or with third-party equip-
ment adhering to the same global standard. Fol-
low the guidelines given to allow audio produced
for different purposes to be mixed – without low
dynamic range material (such as commercials or
pop CDs) always emerging as the loudest.
LM2 core features
►
Real-time loudness meter compliant with
– EBU R128,
– ATSC A/85,
– TR-B32 and ITU-R BS.1770-3.
For legacy purposes, LM2 can also be
switched to the ungated, original BS.1770
measure of Program Loudness.
►
Loudness History Radar display
►
True-peak bar graph display
►
Supports mono and stereo
►
Presets for use in broadcast, music, film and
post production.