Hello everyone!
I would like to know if there is any way to know or measure the exact amplitude (volume) of a file? Reason why I intend to leave all my video-lessons with the same volume.
Thank you very much!
Hello everyone!
I would like to know if there is any way to know or measure the exact amplitude (volume) of a file? Reason why I intend to leave all my video-lessons with the same volume.
Thank you very much!
Example: If the peak amplitude of the selected audio is -20 dB, then the Amplify effect will offer to amplify by +20 dB. Thus, if the default “Amplification (dB)” says “20”, then we know that the peak amplitude of the selection is -20 dB.
Hi Steve!
First I ask you to please consider my faults regarding the duplicity of the topic, it was my distraction.
Regarding your example, get this straight: If the peak amplitude of the selected audio is at -20dB, the Amplify effect will offer and present +20dB amplification. In this example, can we conclude that the audio (-20) is too low and needs to be applied (+20) to be normalized to the 0 (zero) standard?
Not to open another topic, on one occasion I met a puglin that makes the audio uniform (single volume) mainly the voice. Could you let me know what this puglin would be so I can download it?
Thank you very much friend!
Do you mean that it made loud voices quieter and quiet voices louder?
If so, that may have been the Nyquist plug-in: “Level Speech” which you can get here: Missing features - Audacity Support
Instructions for installing Nyquist plug-ins: https://manual.audacityteam.org/man/installing_effect_generator_and_analyzer_plug_ins_on_windows.html#nyquist_install
Hi Steve!
I was hoping you would be able to give me some insight on a problem I am running into. When I find the amplitude of a set audio using the method you described I get -20.616 dB. When I go to analyze → plot spectrum I get -28.9 dB for the peak frequency of the audio. Do you know why these values are 1) differing from one another 2) the peak frequency is registering a lower amplitude? Which of these readings is more reliable? Any guidance would be greatly appreciated!
When you run Amplify, that’s the highest actual sample-value in the file (converted from a floating-point number to dBFS).
The spectrum is dividing-up the audio into frequency bands and the level is usually lower than when everything is combined together in the waveform view (or in the actual raw time-domain audio data).
If you have a single pure tone, the level should be about the same in both.
Note that peaks also don’t correlate with perceived loudness. RMS is a kind of average and it’s better measure of loudness than peak. (Analyze → Measure RMS).
LUFS loudness is even better, and although Audacity has Loudness Normalization built-in to set the loudness, it can’t just measure it. There are 3rd-party plug-ins that might work in Audacity or there is an online loudness tool.