{"id":2216,"date":"2020-10-19T17:16:55","date_gmt":"2020-10-19T17:16:55","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=2216"},"modified":"2020-10-19T17:16:55","modified_gmt":"2020-10-19T17:16:55","slug":"sound-level-volume-normalization","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/sound-level-volume-normalization\/","title":{"rendered":"Sound level, volume, normalization"},"content":{"rendered":"

Sound level, volume, normalization<\/strong><\/p>\n

\"Normalize<\/p>\n

This article provides a brief explanation of the terms Sound Volume, Sound Level, Normalize, Gain, and some others, and their relationship and use in relation to the Digispot broadcast automation system.<\/p>\n

\"Volume<\/p>\n

Sound level
\nThe term sound level refers to the amplitude level of the sound signal. With regard to a programming item, MDB item, or another piece of sound, we are talking about the peak (maximum) signal level in the entire piece. This level is measured in units of dBFS and is almost always negative. This level is important because it depends on how much the level can be increased, and therefore the volume of the sound, without exceeding the theoretical threshold of 0 dBFS.<\/p>\n

The signal level indicators are intended for visual observation of the current signal level in real level.<\/p>\n

A diagram of the signal level change over time is called a signalgram and is used to display phonograms and other sound elements in various windows of the Digispot system, for example, the splice editing window, when editing audio, etc.<\/p>\n

In the Digispot system, the maximum level of the programming item and CDM is calculated once and stored for later use, eg for normalization.
\nThe determination of the peak signal is combined with the simultaneous determination of its loudness, these values \u200b\u200bare always calculated together.<\/p>\n

True sound level
\nThe term True Sound Level refers to the hypothetical amplitude level of an analog sound signal, which is an interpolation of an existing digitized soundtrack. The difference with just “Level” is that when sampling, the sample points on the time axis may not reach the maximum points of the analog signal. For example, if we have a sinusoidal signal with a frequency of 11025 Hz and we digitize it with a frequency of 44100, then the peak value of the digitized phonogram level can have a value from -3dBFS to 0dBFS, depending on the phase shift of the point of sampling on the time axis. enter the sign. At higher signal frequencies, the peaks can be further underestimated.<\/p>\n

ITU-R BS.1770-3 (Annex 2) defines the algorithm to calculate the “True Peak Level”. The proposed procedure is reduced to increasing the sampling frequency 4 times and filtering, then the maximum amplitude is found from the interpolation of the signal obtained.<\/p>\n

In the Digispot system, the peak indicators in the editor, property windows, and splices have the ability to display the actual sound level.<\/p>\n

Sound volume
\nLoudness is an estimate of the intensity with which the listener perceives the material. This value is calculated using a special algorithm that takes into account the perception of human sound, developed by ITU \\ ITU-BS.1770.<\/p>\n

Loudness is measured in LUFS units, which are physically identical to decibels. The volume is directly related to the level of the signal: the higher the level of the signal, the higher its volume.
\nNumerically, this relationship is linear: if the signal level increases by 6 dB, the volume will also increase by 6 LU. (To be mathematically precise, the relationship is not linear, but for most practical applications, the deviation from the linear relationship can be neglected.)<\/p>\n

The loudness control in real time is carried out by volume indicators, there are two of them: M – Momentary and S – Short term, they differ in the measurement intervals: 0.4 sec and 3 sec, respectively.<\/p>\n

To evaluate the loudness of a range of sound, a special technique has been developed that calculates the value of the loudness of the range, denoted by the value I and called integrated loudness. This is the value you refer to when talking about the loudness of a programming item or MDL.<\/p>\n

In the Digispot system, the integral loudness of the programming item and MDB is calculated once and stored for later use, eg for normalization.<\/p>\n

In Russia, the methodology for measuring the volume of programs is determined by the order of the Federal Antimonopoly Service of May 22, 2015 No. 374\/15. The loudness of the programs is regulated by Federal Law 338.<\/p>\n

Relationships between digital audio peak level, actual peak level, volume, and notation
\nWhen talking about the signal level (more precisely, the peak level), the notation dBFS – dB Full Scale is used. This scale has a 0dB point tied to the full range of the signal represented in the bit width used. For example, with 16-bit audio samples, the representable values \u200b\u200bare -32768 to +32767, so the signal level value in dBFS is calculated as 20 lg (s \/ 32768), where s is the value of the sample in this representation or the maximum absolute value of the samples in the interval of interest.<\/p>\n","protected":false},"excerpt":{"rendered":"

Sound level, volume, normalization This article provides a brief explanation of the terms Sound Volume, Sound Level, Normalize, Gain, and some others, and their relationship and use in relation to the Digispot broadcast automation system. Sound level The term sound level refers to the amplitude level of the sound signal. With regard to a programming … Continue reading “Sound level, volume, normalization”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[16220,47558,47566,47562,47564,47565,47635,47563,47568,47579,47578,47583,47585,47584,47582,47591,47590,47589,47600,24700,47572,47573,47574,47597,47598,47606,47607,47616,36435,47612,47614,47613,47615,47619,47618,47621,47622,47588,47599,47608,47617,47624,47625,47627,47632,47620,47587,47554,47557,47552,47556,47547,47551,47555,47553,47559,47561,47571,47569,47570,47577,47581,47580,47586,38631,47595,47592,47596,47594,47603,47605,47604,47601,47602,47609,47610,47546,47548,5636,47550,47549,47611,47623,47628,47630,47626,47629,47575,47544,47576,47545,47639,2004,47593,47638,47631,47633,47634,47637,47560,47567,47636],"class_list":["post-2216","post","type-post","status-publish","format-standard","hentry","category-audio-video","tag-audio-volume-normalization-windows","tag-best-volume-normalization-software","tag-data-volume-normalization","tag-deezer-volume-normalization","tag-denon-volume-normalization","tag-disable-volume-normalization","tag-disable-volume-normalization-youtube","tag-discord-volume-normalization","tag-enable-volume-normalization","tag-handbrake-volume-normalization","tag-hulu-volume-normalization","tag-iina-volume-normalization","tag-intracranial-volume-normalization","tag-ios-volume-normalization","tag-itunes-volume-normalization","tag-lamexp-volume-normalization","tag-libreelec-volume-normalization","tag-librespot-volume-normalization","tag-netflix-volume-normalization","tag-normalization-volume-in-audio","tag-normalized-volume-flow","tag-normalized-volume-flow-rate","tag-normalized-volume-formula","tag-normalized-volume-mt4","tag-normalized-volume-mt5","tag-normalized-volume-oscillator","tag-normalized-volume-oscillator-mt5","tag-normalized-volume-ratio","tag-normalized-volume-tradingview","tag-poweramp-volume-normalization","tag-ps4-volume-normalization","tag-pulseaudio-volume-normalization","tag-qobuz-volume-normalization","tag-real-time-volume-normalization","tag-realtek-volume-normalization","tag-sonos-volume-normalization-spotify","tag-sox-volume-normalization","tag-spotify-volume-normalization-local-files","tag-spotify-volume-normalization-not-working","tag-spotify-volume-normalization-on-or-off","tag-spotify-volume-normalization-reddit","tag-tidal-volume-normalization","tag-tv-volume-normalization","tag-use-volume-normalization","tag-video-volume-normalization","tag-vlc-volume-normalization-settings","tag-volume-level-normalization","tag-volume-normalization-alexa","tag-volume-normalization-alternatives","tag-volume-normalization-amazon-music","tag-volume-normalization-amplitude","tag-volume-normalization-android","tag-volume-normalization-app","tag-volume-normalization-app-iphone","tag-volume-normalization-apple-music","tag-volume-normalization-commercials","tag-volume-normalization-echo-dot","tag-volume-normalization-for-apps","tag-volume-normalization-for-linux","tag-volume-normalization-for-windows","tag-volume-normalization-gain","tag-volume-normalization-ipad","tag-volume-normalization-iphone","tag-volume-normalization-java","tag-volume-normalization-loudness-wars","tag-volume-normalization-methods","tag-volume-normalization-mpc","tag-volume-normalization-music","tag-volume-normalization-music-player-apps","tag-volume-normalization-on-android","tag-volume-normalization-on-ipad","tag-volume-normalization-on-iphone","tag-volume-normalization-on-mac","tag-volume-normalization-on-youtube","tag-volume-normalization-pandora","tag-volume-normalization-player","tag-volume-normalization-plex","tag-volume-normalization-razer","tag-volume-normalization-software","tag-volume-normalization-sonos","tag-volume-normalization-spotify","tag-volume-normalization-spotify-pc","tag-volume-normalization-test","tag-volume-normalization-vlc","tag-volume-normalization-vlc-mac","tag-volume-normalization-vlc-ubuntu","tag-volume-normalization-voice","tag-volume-normalization-wav-files","tag-volume-normalization-windows-10","tag-volume-normalization-with-ffmpeg","tag-volume-normalization-youtube","tag-volume-normalize","tag-volume-normalizer","tag-volume_normalization-mpd","tag-volumio-2-volume-normalization","tag-volumio-volume-normalization","tag-webex-volume-normalization","tag-xbmc-volume-normalization","tag-youtube-music-volume-normalization-2020","tag-youtube-volume-normalization-disable","tag-youtube-volume-normalization-extension","tag-zoom-volume-normalization"],"yoast_head":"\nSound level, volume, normalization - 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