Loudness logging and analyzing, Analysis of multi-segment loudness logs – Grass Valley iControl V.6.02 User Manual
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Logs
Loudness Logging and Analyzing
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Loudness Logging and Analyzing
Certain devices like the Kaleido-Solo are capable of monitoring the loudness of audio streams.
The data generated from monitoring may be sent to an Application Server where iControl’s
Loudness Logger can record and archive this stream of loudness data to a dedicated, external
drive.
After (or even during) the logging of loudness data, iControl’s Audio Loudness Analyzer can
plot a log file’s data, making it visible in units of LUFS (EBU) or LKFS (A85) over the time period
covered by the file. Audio Loudness Analyzer allows you to zoom into the data plot as well,
effectively taking a subset of the time frame analyzed while increasing data granularity in the
chart.
With Audio Loudness Analyzer, you may edit analysis parameters as well as showing or
hiding certain data plots (e.g. choosing to show or hide the DIALNORM and Short-term
Momentary 1 data plots on the chart).
Analysis of Multi-Segment Loudness Logs
Depending on the type of device used to log loudness data (upstream of your Application
Server), you may or may not have segment-specific information multiplexed with the
loudness data. If the loudness data in your log file consists of many segments (perhaps
hundreds), you may wish to generate a multi-segment report over a span of time of your
choosing. iControl allows you to do this.
If your loudness log file consists of segments, you may wish to view analysis data with clear
demarcations between segments, along with the display of other segment-specific meta-data.
This is possible if segment information is included with the loudness data by the source
logging device. Alternatively, it is also possible if segment information is available as an
external
As-Run
log file.
An
As-Run
log file is a text-based file. There are variations in
As-Run
file types, but these differ
from one another only in format and organization of information. Regardless of the file type
chosen, all
As-Run
log files are equivalent in function, that being to allow Audio Loudness
Analyzer to map the
As-Run
file’s segment times (and other meta-data) to discrete chunks of
loudness data. This effectively allows Audio Loudness Analyzer to analyze, display, and
report loudness data with segment-level granularity.
Note: Logging loudness data necessarily involves an external drive in a NAS
(network attached storage) environment because loudness log files can grow rapidly
in size and number. The storage capacity of an Application Server is inadequate for
this purpose.
See also
For more information about:
• Loudness Logger, see
• Audio Loudness Analyzer, see
• A sample workflow for loudness logging and analyzing, see