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| Loudness Standards Guide |
VisLM supports current loudness metering standards (ITU-R BS.1770/1,
EBU R128, ATSC A/85) more...
Further information covering delivery requirements, LUFS, LKFS,
calibration and test tones here.
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Loudness Tips
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How loudness metering and
measurement can help you | |
| Loudness Tip
No. 1 |
Peak normalise to 0dBFS - probably
distorting to +6dBFS or more! |
| Sample
peak meters don't measure the peak level of the audio.
What? The
True Peak Level of an audio signal is the maximum value of the signal,
Sample Peak and QPPM (Quasi-Peak Program Meter) Meters do not measure
this level with accuracy as they miss the true peaks of a waveform
which potentially lie between samples. The implementation of True Peak
metering to BS. 1770 allows these inter-sample peaks to be detected. A
modern rock/pop song at zero dBFS will typically distort over 0dBTP 20
or more times a second! |
| Loudness Tip
No. 2 |
Will your audio ever get compressed to MP3
or AAC (iPod)?
If so you need True Peak metering |
| Intersample
peak measurement is the only way to accurately monitor audio levels
when preparing for lossy compression codecs. Intersample peaks add
increased distortion (additional clipping) to the existing audio during
the compression process - what may have been a 'just pass' on your quality studio system becomes
harsh and wearing after compression. |
| Loudness Tip
No. 3 |
What's the rush? It's just a passing trend. Turns out it's already been adopted somewhere near you... |
| Loudness
metering and regulation has now been adopted and/or is in force across
the world including USA (CALM Act), Japan, Austria, France, Germany,
Italy, Netherlands and many others. The ITU-R B.S. 1770 standard has
been adopted as the basis of measurement by the ATSC (Advanced
Television Systems Committee), EBU (European Broadcasting Union), ARIB
(Association of Radio Industries & Broadcast), AGCOM
(Autorità per le Garanzie nelle Comunicazioni) and others. |
| Loudness Tip
No. 4 |
Avoid costly rejections - Do you produce audio for
TV? Avoid rejections by dealing with loudness now. |
| Many,
if not most of the major channels and are now specifiying loudness
parameters within the audio delivery specification. If you don't know
what integrated program loudness or dBTP are, it's time to get up to
speed quickly before you loose a client. |
| Loudness Tip
No. 5 |
#Gameaudio #Newseditor - Hundreds of voice clips to sort out? Batch process for loudness consistency |
| With audio from a myriad of different
sessions, locations and voice artists, leveling for loudness
consistency can be a time consuming and hit-and-miss affair. Loudness
normalisation batch processing can fix the entire game/program dialogue in
minutes. Try a free demo of LMB Loudness Management Batch processing for yourself. |
| Loudness Tip
No. 6 |
Music beds - Consistent loudness with clear dialogue - fast? Loudness separation has the answers. |
| Dialogue clarity tasks can catch the best
of us out, especially if we are trained listeners (Brian Cox on the BBC
anybody?). With loudness metering you can now objectively measure
the loudness separation of dialogue from backround content and maintain a
minimum LU differential. |
| Loudness Tip
No. 7 |
#AudioContinuity - TV, Radio, Album, compilation? Ensure objective measurement. |
| Loudness jumps are the number one consumer
complaint. Program loudness measurement allows you to match the
loudness of different source material (even dynamic and compressed)
easily without large percieved jumps in level. |
| Loudness Tip
No. 8 |
#AudioEditing - Interviews with sound clips all over the place? Loudness meters give you consistency fast. |
| Different locations, mic. proximity,
backgrounds and speakers make balancing audio clips from one section to
the next a tough job in a high pressure editing environment. Real time
and in-edit clip processing can be a real time saver and delivers consistent results you can rely on at the end of a long day. |
| Loudness Tip
No. 9 |
#BroadcastAudio - Why does my super brick-wall 0dBFS ad suddenly sound quiet on TV? |
| Loudness normalisation means that audio is
now being balanced by it's overall program loudness (the entire spot is
measured and given a value) from one ad to the next. If you max. the
compression, you simply get turned down until your average is in line
with every one else ( -24 LKFS / -23 LUFS). |
| Loudness Tip
No. 10 |
#AudioForAdvertisments - Exploit a fuller dynamic range and gain a creative lead over the competition. |
| If hyper compression leads to an ad that
gets turned down and plays though at a consistently 'average'
level, then moving to a dynamic mix can allow you some really loud
moments (-1dBTP in some specs!) -loudness normalisation hands you your
creativity back. |
| Loudness Tip
No. 11 |
#GameAudio - vast sound library from different sources? Loudness normalisation saves time. |
| Sound FX from different libraries, with
different EQ and compression can sound very different in-game with loudness jumps and bursts requiring endless corrections.
Batch process the entire library to prepare it for immediate use. Try a free demo of LMB Loudness Management Batch processing for yourself. |
| Loudness Tip
No. 12 |
#BroadcastAudio delivery compliance - proving compliance with submission is easy with loudness profile logs. |
Submitting a loudness profile with your
work proves compliance easily. Graphing logs in EXCEL makes them easy
to check and gives you peace of mind (or helps you to spot an error at
the last minute!)
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| Loudness Tip
No. 13 |
Re-purposing audio? Film to TV to iPod to Streaming - Measure LRA, the secret loudness weapon. |
The LRA (Loudness Range) parameter is an
almost forgotten weapon in the loudness experts armoury. Use it to help
decide if and how much compression is needed to tame the luxury of full
cinema dynamics to more challenging listening situations.
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| Loudness Tip
No. 14 |
Historical archive material - Achieve conformance for hundreds of
hours of archive material automatically using batch-processing |
| Conform your historical archives using loudness batch processing. Try a free demo of LMB Loudness Management Batch processing today. |
| Loudness Tip
No. 15 |
Super-quick editing - Try @AVID #Audiosuite loudness solutions to process in-edit faster than real-time. |
| An often overlooked secret in AVID editors
is the file based Audiosuite process, which allows you to analyse and
correct entire files in a couple of clicks. Try LM-Correct in-edit clip processing here. |
| Loudness Tip
No. 16 |
#Conferencing / #ChurchSound - keep all those contributors at the same loudness level: male, female, love the mic. or hate it!
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| Loudness jumps between different speakers
causes fatigue and irritation, detracting from the message. Preserving clarity and avoiding
annoyance can be difficult - loudness meters give you an objective
measure of percived loudness in every situation, showing you a numeric
difference you can correct in an instant. |
| Loudness Tip
No. 17 |
#LiveSound - protect against loudness changes between different operators and sound sources using loudness measures.
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| Deliver consistent loudness to the consumer
between operator shifts and changes of content using loudness measures
and consistency guidelines. |
| Loudness Tip
No. 18 |
Quality Control - 'Hot folder' finished productions for automatic checking (and correction)
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| Use the hot-folder feature of batch
processing to automatically check submitted production for loudness
conformance and reject/accept/fix automatically. Trial LMB Loudness Management Batch processing today. |
| Loudness Tip
No. 19 |
#LiveSound - avoid loudness drift over time due to tired ears and
changing content by using real-time loudness history graphing |
Use the real-time histroy graph of your
loudness meter to monitor the short-term loudness over time to make
sure it doesn't wander and stays within specification and comfort
boundaries.
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| Loudness Tip
No. 20 |
Quality Control - use warning indicators (real time or marked logs)
to highlight potential problems and quickly identify the cause. |
Often forgotten or ignored as among the more esoteric features, Loudness logging markers and real-time
meter alerts can be very useful for those who need an early warning
system or are involved in post mortem analysis. Markers and alerts
identify the problem where it occurs allowing you to quickly identify
the source of the problem.
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| Loudness Tip
No. 21 |
#Conferencing / #ChurchSound - deal with the unexpected (mic. passed around for questions?) smoothly using a real-time meter |
Unexpected microphone use or previously set
laptop audio modified by the user can cause sudden unexpected loudness
jumps. Use a real time meter to immediately see the gain adjustment
required and save inexperienced operators the guess work.
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| Loudness Tip
No. 22 |
In a rush? Offline processing techniques can check & conform at over 1 sec/minute of audio. |
| Utilise hot folders or Audiosuite
processing in your editor to really speed up your workflow. Automatic
conformance checks can save you and your team running the audio again
to check integrated program loudness and true peak compliance. Auto
correction can be used to quick-fix failing files. Trial LMB Loudness Management Batch processing and LM-Correct in-edit clip processing today. |
Try out these tips
for yourself with our free trial now!
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- Clear loudness measurement
- Real-time metering
- Loudness history (VisLM-H)
- Audience specific loudness profiling
- True-peak level monitoring
- Program loudness matching
- Genre compatibility measurement
- Consistency assessment
- Historical diagnostic, 30sec-24hr
- Dynamic range profile targeting
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Objective
loudness metering |
more... |
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True-Peak
metering |
more... |
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Loudness
history and logging (VisLM-H) |
more... |
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Broadcast|Film|Multi-media
standard compliant |
more... |
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Design
for play-back context |
more... |
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Mono
through 5.1 surround compatible |
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VisLM-H
| visLM-C comparison table |
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Stand-alone application |
more... |
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| Save on VisLM |
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Huge savings of up to 30% with our attractive product bundles. more...
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| System Requirements |
VisLM is available in RTAS, VST and AU formats for PC and Mac
(universal
binary)
Mac OSX 10.4.x (Stand-alone app. requires OSX 10.5.x), G4 1.4 GHz or
Intel® Core™ Duo 1.66 GHz, 512 MB RAM
Windows XP or Windows Vista, Pentium 1.4 GHz, 512 MB RAM
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| NuGen Studio |
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A complete solution for the
control and enhancement of your spatial image and our comprehensive
audio analysis software. more...
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| Faster
than realtime loudness analysis directly within your Avid
Editor? |
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