In contrast to compression, the normalization process does not do any dynamics processing of any sort, not as a general rule. Learn more about audio compression and limiting for music, podcasting and video here! Audio Peak and Loudness Normalization This is used to stop the sound of a voice recording, a guitar or a whole mix from reaching a level where the sound would create digital clipping, which sounds horrible and flattens the sound peaks, leaving little detail. The compressor usually stops it in more fine ways, like with the option to set more parameters such as attack, release and knee functions, whereas the limiter does the job of stopping all sound at a given level, usually at 0 dBFS. So, audio compressors use the peaks or the immediate RMS levels (basically the general perceived volume of sound peaks) to stop sound from getting too loud. Audio compression & compressors / limiters This is either from the Peak Level or the RMS level of the file. Audio normalization is aimed at raising or lowering the entire file/recording to a certain level. Where compression/limiting is mostly aimed at handling the immediate dynamics and peaks, leveling usually does the job of changing the overall parts inside of an audio file to better match each other, producing a whole file that is better internally, as a block/clip. While they are aimed in the same direction, which is to even out the differences in volume and amplitude within an audio recording, they go a bout it in different ways or handle different aspects of the process. The 3 biggest conceptual methods for achieving a sound that is even and loud are called audio compression/limiting, audio leveling and audio normalization.Īudio compression (as in using an audio compressor, not lossy compression, like MP3) is not to be confused with normalization or leveling. This is especially important today as we have an audio landscape in media where sound plays a big part in how we perceive information and often the quality of a production, whether it´s a video clip, a movie / series or a song on the ether. The core concept of audio dynamics treatment is to level out the differences in amplitude in the recording at hand. (see link in my previous post).Ever wondered why there are so many tools for treatment of volume and sound dynamics? Well this post aims to shine a light on why and what to use to get the proper job done. You may find that using -27 dB, which will sound slightly quieter, is not clipping your high range, which you can then compensate for by turning up the volume! But for film I would not recommend any of those settings. For a music video I think I might be inclined to use -31 DN and DRC set to none, which will yield an identical sound to a wave file of the same audio, but it would be good to analyze the audio first and make sure no clipping is going on. Don't feel bad, Aedipuss, my original writeup here was also wrong in a number of ways, which is why I have edited my previous post.Ĭ627627, it sounds like you did the right thing with your dialogue normalization setting, assuming you changed the dynamic range compression settings to none. By coincidence because dialogue tends to go mostly through the center speaker, you will notice the most substantial changes there on a 5.1 film audio track, but dialogue normalization still very much applies to stereo audio tracks. Edited menu sounded about the same as the original when Dialog normalization was set to the most extreme value of -31 dB.Īedipuss is simultaneously right and wrong. Edited menu sounded quieter than the original when Dialog normalization was set to -27 dB.Ģ. I only made slight modifications, and did not wish the perceived level of volume to be different.ġ. I wanted the menu to sound as loud as the original. This was not about editing a movie where the intricacies of footsteps vs. It did not sound as loud as the original. With each edit, as I recall, the overall menu volume sounded quieter. I was editing an Iron Maiden music DVD menu and naturally I wanted it to sound just as loud as the original. Then you can convert back to ac3 with whatever dialogue normalization level you want! Hope this helps clear up some confusion for people. Convert to a lossless format like wave, w64, or PCM. When it comes to editing, you should never edit in AC3. So to answer your original question c627627, it really depends on what is specifically happening in the sound file you are listening to in terms of whether it sounds louder or quieter at different dialogue normalization levels, and it depends on how your sound system is setup that you are listening on.
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