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3 votes

Linear loudness normalization in FFMPEG is in fact dynamic

As mentioned in a comment, FFMPEG will revert to dynamic in the conditions specified in the manual: linear Normalize by linearly scaling the source audio. measured_I, measured_LRA, measured_TP, and ...
emonigma's user avatar
  • 255
3 votes

Normalization - peak amplitude level vs actual loudness level

My suggestion is to do three steps. Step one, using your EARS, adjust the volume of the various portions of your program so that they have the correct relative volume that you want. If you want them ...
Mark's user avatar
  • 31
3 votes
Accepted

Not able to remove noise after recording from headphone output to microphone input

I'll try to go through this quickly :) and disclaimer: I'm not an electrician! The first unwritten rule in noise reduction is to record with as little noise as possible in the first place. Correct ...
n00dles's user avatar
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3 votes
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What are up-to-date practises for music mixing for a consistent loudness across different delivery platforms?

OK, so not a really comprehensive question from me, but really I posted this question simply so that I could forward this link into the stack, which I believe is useful to update people on more up-to-...
Mark's user avatar
  • 8,900
2 votes
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What are the current techniques for measuring programme loudness?

Master Reference documentation relating to EBU and ITU Recommendations that relate to loudness measurement techniques and algorithms can be found at : https://tech.ebu.ch/docs/r/r128.pdf https://www....
Mark's user avatar
  • 8,900
2 votes

One clip becomes louder when merging clips in Adobe Audition

Here's what I think is happening: The clip that shows louder after merging is louder before merging. With only your screen grabs to go on, it looks like the individual files are rendering and image of ...
7HzResearch's user avatar
2 votes
Accepted

How to convert between LUFS and LU (EBU mode)

0 LU is defined by the EBU as -23 LUFS (https://tech.ebu.ch/docs/tech/tech3341.pdf) : The scale used may either be an absolute scale, using the unit ‘LUFS’, or alternatively the zero ...
audionuma's user avatar
  • 2,864
2 votes

What defines loudness of mp3 in a file?

Let’s take a CD audio audio stream. It is a stream of 16 bits samples : in an other word, a stream of numbers between -32768 and +32767. On audacity, each number is matched with a number between -1 ...
Frédéric LOYER's user avatar
2 votes

Augmenting the Amplitude of an Audio File to Make it Louder

This is a hard limit of the gain stage, whether you do it in processing with mp3s or in hardware. The reason your compressor works well the first time, especially if you have set it quite high, is ...
Rory Alsop's user avatar
  • 6,063
2 votes
Accepted

Audio normalization / mixing for "imperfect" vlog audio

My take on this. The first to try if you have it (believe it is only in Beta for Studio version) is the dialogue leveler. If that does not work go manual. You may automate the volumes but that works ...
ghellquist's user avatar
  • 1,624
1 vote

Augmenting the Amplitude of an Audio File to Make it Louder

If you want to make it sound louder, and the file's maximum volume is already at 0 dB, you can compress the sound. This can increase the average volume without changing the maximum volume. Audacity ...
Hobbes's user avatar
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1 vote

Audio normalization / mixing for "imperfect" vlog audio

Until about 6 months ago, I would have posted a long, convoluted tutorial on how to achieve this using gates, compressors, limiters, noise removal software… There's little point these days as Adobe ...
Tetsujin's user avatar
  • 8,701
1 vote

How do I adjust recorded audio so that the quiet parts become louder and the loud parts become quieter?

This is one reason why a) you do a level check before you go & b) why you record to separate tracks. If compression/limiting can't make up the gain enough, or over-compresses one voice without ...
Tetsujin's user avatar
  • 8,701
1 vote
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Whether the audio file safe for my speaker? How can I know?

No matter what the maximum volume is of the file, your amplifier will have input and output maximum. If the input is too high, your gain stage will clip - generally not pleasant, but it limits the ...
Rory Alsop's user avatar
  • 6,063
1 vote

Make quiet quieter and loud louder using vst or equalizer apo

The situation you are describing is where I would use a noise gate. When there is talk going on, the gate opens. When there is no talk going on, the noise gate closes and there will be silence. This ...
ghellquist's user avatar
  • 1,624
1 vote
Accepted

Loudness normalization makes file four times larger

Inspecting the input and output files, I realized that the output was upsampled from 48 kHz to 192 kHz. I disabled that with the option -ar 48000.
emonigma's user avatar
  • 255
1 vote

How to destroy audio (blown-out clipping effect)

A simple, easy way of doing it is by using the amplify effect in audacity. Just select the audio and increase by a couple of dbs and listen to how it sounds (Remember to enable clipping). If you want ...
Alejandro Zuñiga's user avatar
1 vote
Accepted

Shockwaves: loudness or speed?

Your research is heading in the right direction, but you should firstly understand that as an absolute measurement metric, the "decibel" is meaningless. It's like asking someone "how long is that ...
Mark's user avatar
  • 8,900
1 vote
Accepted

How do I comply with the CALM act in the US with loudness levels?

Although I am not a lawyer, I believe that the CALM act does apply to commercials, either the ones you produce in-house or the one provided by a third party (as I suppose you are in the US). For the ...
audionuma's user avatar
  • 2,864
1 vote
Accepted

How do I eliminate (or reduce) the dynamic range?

You're heading in the right direction. Compression is what you need, though maybe you want more of it. A 'harder' version of compression is known as Limiting. Using a limiter rather than regular ...
Tetsujin's user avatar
  • 8,701
1 vote

Improving digitalized tape recordings - more than what I've done

Wav files are better quality but unfortunately converting a compressed .mp3 to a .wav doesn't improve quality. I would interpret the "blanket" over the voice to sound like it's muffled which means ...
Timinycricket's user avatar
1 vote

Intensity, amplitude, frequency, and perceived loudness

I'm not entirely well versed in the mathematics behind acoustics, but I don't think you can map a purely linear correlation with perceived loudness. There are multiple kinds of frequency functions ...
user2188400's user avatar
1 vote
Accepted

Fixing loudness on large MP3 comedy gig recordings

Try leveling, a much used compression technique. set compressor speed to the fastest setting lower threshold to the lowest setting play with the ratio between 1...2(2is kinda extreme 1.2-1.3 is ...
frcake's user avatar
  • 1,574
1 vote

Why isn't the classical guitar part of an orchestra?

Guitars, like pianos, are percussive instruments. As such, they are severely limited in being able to contribute to a smooth sound texture. They can be employed as solo instrument or in chamber ...
user20399's user avatar
1 vote

loudness metering

All of these options others have listed here are great. Just wanted to add that iZotope's Insight plugin is also excellent for monitoring True Peak loudness in accordance with EU broadcast standards. ...
user2188400's user avatar

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