MP3Gain - Revision history

Beardgoggles: /* Tags */ Added info on tag removal.

2020-03-17T18:19:03Z

Tags: Added info on tag removal.

← Older revision		Revision as of 18:19, 17 March 2020
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	== Tags ==		== Tags ==
	MP3Gain writes the following ~~custom~~ [[~~tag~~]]~~s in the~~ [[~~APEv2~~]] ~~format~~, which is what allows the tool to reverse the changes:		MP3Gain writes the following [[APEv2]] [[tag]]s, which is what allows the tool to reverse the changes:

	* MP3GAIN_MINMAX		* MP3GAIN_MINMAX
	* MP3GAIN_ALBUM_MINMAX		* MP3GAIN_ALBUM_MINMAX
	* MP3GAIN_UNDO		* MP3GAIN_UNDO

			Modifying the file's tags in another program, such as [[foobar2000]], may cause any MP3Gain-specific tags to be stripped from the file.<ref>{{ha\|url=https://hydrogenaud.io/index.php?topic=101182.0\|title=Remove ReplayGain tags without removing MP3Gain tags}}</ref>

			== References ==
			<references/>

	== External links ==		== External links ==

Beardgoggles: Corrected stable release date.

2020-03-16T19:37:42Z

Corrected stable release date.

← Older revision		Revision as of 19:37, 16 March 2020
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	\| released = <!-- {{start date and age\|YYYY\|MM\|DD}} -->		\| released = <!-- {{start date and age\|YYYY\|MM\|DD}} -->
	\| stable_release = 1.2.5		\| stable_release = 1.2.5
	\| stable_release_date = {{start date and age\|~~2018~~\|09~~\|24~~}}		\| stable_release_date = {{start date and age\|2005\|01\|09}}
	\| preview_release = 1.3.4		\| preview_release = 1.3.4
	\| preview_release_date = {{start date and age\|2018\|09\|24}}		\| preview_release_date = {{start date and age\|2018\|09\|24}}

Beardgoggles: Added software infobox; tag info.

2020-03-16T19:26:26Z

Added software infobox; tag info.

← Older revision		Revision as of 19:26, 16 March 2020
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	'''MP3Gain''' is a program that analyzes [[MP3]] files to determine how loud they sound to the human ear. It can then adjust the [[MP3]] files so that they all have the same loudness without any quality loss. This way, you don't have to keep reaching for the volume dial on your [[MP3]] player every time it switches to a new song.		{{infobox software
			\| name = MP3Gain
			\| logo =
			\| screenshot = [[File:MP3Gain.png\|256px]]
			\| caption = MP3Gain 1.2.5 main window
			\| developer = Glen Sawyer
			\| released = <!-- {{start date and age\|YYYY\|MM\|DD}} -->
			\| stable_release = 1.2.5
			\| stable_release_date = {{start date and age\|2018\|09\|24}}
			\| preview_release = 1.3.4
			\| preview_release_date = {{start date and age\|2018\|09\|24}}
			\| preview_release_ref =
			\| operating_system = Windows
			\| use = [[ReplayGain]]
			}}
			'''MP3Gain''' is a program that analyzes [[MP3]] files to determine how loud they sound to the human ear. It can then adjust the MP3 files so that they all have the same loudness without any quality loss. This way, you don't have to keep reaching for the volume dial on your MP3 player every time it switches to a new song.

	MP3Gain is an implementation of [[ReplayGain]], supporting Track mode and Album mode. However, with most other formats, the necessary loudness adjustment of ReplayGain is stored as metadata, thus leaving the encoded results alone. With MP3Gain, the loudness adjustment is done on the data itself, albeit in a lossless/reversible way~~. Another difference with MP3Gain is the fact that it can only adjust physical volume in 1.5 dB steps~~.		MP3Gain is an implementation of [[ReplayGain]], supporting Track mode and Album mode. However, with most other formats, the necessary loudness adjustment of ReplayGain is stored as metadata, thus leaving the encoded results alone. With MP3Gain, the loudness adjustment is done on the data itself, albeit in a lossless/reversible way.

	== Technical ~~Explanation~~ ==		Another difference with MP3Gain is the fact that it can only adjust physical volume in 1.5 [[bel\|dB]] steps.

			== Technical explanation ==
	Here's the technical reason on why it's lossless (despite operating on the data itself), and also why the smallest change possible is 1.5 dB:		Here's the technical reason on why it's lossless (despite operating on the data itself), and also why the smallest change possible is 1.5 dB:

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	* Likewise, if you subtract 1 from this field, you multiply the amplitude by 2^(-1/4) = 84 % = -1.5 dB.		* Likewise, if you subtract 1 from this field, you multiply the amplitude by 2^(-1/4) = 84 % = -1.5 dB.

	The way MP3Gain works actually has a very strong benefit: ~~Since~~ it is the data itself that is modified, MP3Gain does not require special support from players.		The way MP3Gain works actually has a very strong benefit: since it is the data itself that is modified, MP3Gain does not require special support from players.

			== Tags ==
			MP3Gain writes the following custom [[tag]]s in the [[APEv2]] format, which is what allows the tool to reverse the changes:

			* MP3GAIN_MINMAX
			* MP3GAIN_ALBUM_MINMAX
			* MP3GAIN_UNDO

	== ~~Links~~ ==		== External links ==
	* [http://mp3gain.sourceforge.net/ MP3Gain's official website]		* [http://mp3gain.sourceforge.net/ MP3Gain's official website]
	* [https://hydrogenaud.io/index.php/topic,3274 MP3Gain tutorial] on HA Forums		* [https://hydrogenaud.io/index.php/topic,3274 MP3Gain tutorial] on HA Forums

203.221.239.65: fix forum link

2019-08-28T00:35:35Z

fix forum link

← Older revision		Revision as of 00:35, 28 August 2019
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	== Links ==		== Links ==
	* [http://mp3gain.sourceforge.net/ MP3Gain's official website]		* [http://mp3gain.sourceforge.net/ MP3Gain's official website]
	* [~~http~~://~~www~~.~~hydrogenaudio.org/forums~~/index.php~~?act=ST&f=15&t=~~3274 MP3Gain tutorial] on HA Forums		* [https://hydrogenaud.io/index.php/topic,3274 MP3Gain tutorial] on HA Forums


	[[Category:Software]]		[[Category:Software]]

Notat: Replay Gain -> ReplayGain

2011-07-27T17:27:53Z

Replay Gain -> ReplayGain

← Older revision		Revision as of 17:27, 27 July 2011
Line 1:		Line 1:
	'''MP3Gain''' is a program that analyzes [[MP3]] files to determine how loud they sound to the human ear. It can then adjust the [[MP3]] files so that they all have the same loudness without any quality loss. This way, you don't have to keep reaching for the volume dial on your [[MP3]] player every time it switches to a new song.		'''MP3Gain''' is a program that analyzes [[MP3]] files to determine how loud they sound to the human ear. It can then adjust the [[MP3]] files so that they all have the same loudness without any quality loss. This way, you don't have to keep reaching for the volume dial on your [[MP3]] player every time it switches to a new song.

	MP3Gain is an implementation of [[~~Replay Gain~~]], supporting Track mode and Album mode. However, with most other formats, the necessary loudness adjustment of ~~Replay Gain~~ is stored as metadata, thus leaving the encoded results alone. With MP3Gain, the loudness adjustment is done on the data itself, albeit in a lossless/reversible way. Another difference with MP3Gain is the fact that it can only adjust physical volume in 1.5 dB steps.		MP3Gain is an implementation of [[ReplayGain]], supporting Track mode and Album mode. However, with most other formats, the necessary loudness adjustment of ReplayGain is stored as metadata, thus leaving the encoded results alone. With MP3Gain, the loudness adjustment is done on the data itself, albeit in a lossless/reversible way. Another difference with MP3Gain is the fact that it can only adjust physical volume in 1.5 dB steps.

	== Technical Explanation ==		== Technical Explanation ==

Speckmade at 19:56, 13 June 2007

2007-06-13T19:56:20Z

← Older revision		Revision as of 19:56, 13 June 2007
Line 1:		Line 1:
	'''MP3Gain''' is a program that analyzes [[MP3]] files to determine how loud they sound to the human ear. It can then adjust the [[MP3]] files so that they all have the same loudness without any quality loss. This way, you don't have to keep reaching for the volume dial on your [[MP3]] player every time it switches to a new song.		'''MP3Gain''' is a program that analyzes [[MP3]] files to determine how loud they sound to the human ear. It can then adjust the [[MP3]] files so that they all have the same loudness without any quality loss. This way, you don't have to keep reaching for the volume dial on your [[MP3]] player every time it switches to a new song.

	MP3Gain is an implementation of [[~~Replaygain~~]], supporting Track mode and Album mode. However, with most other formats, the necessary loudness adjustment of ~~Replaygain~~ is stored as metadata, thus leaving the encoded results alone. With MP3Gain, the loudness adjustment is done on the data itself, albeit in a lossless/reversible way. Another difference with MP3Gain is the fact that it can only adjust physical volume in 1.5 dB steps.		MP3Gain is an implementation of [[Replay Gain]], supporting Track mode and Album mode. However, with most other formats, the necessary loudness adjustment of Replay Gain is stored as metadata, thus leaving the encoded results alone. With MP3Gain, the loudness adjustment is done on the data itself, albeit in a lossless/reversible way. Another difference with MP3Gain is the fact that it can only adjust physical volume in 1.5 dB steps.

	~~==Technical Explanation==~~

			== Technical Explanation ==
	Here's the technical reason on why it's lossless (despite operating on the data itself), and also why the smallest change possible is 1.5 dB:		Here's the technical reason on why it's lossless (despite operating on the data itself), and also why the smallest change possible is 1.5 dB:

Line 10:		Line 9:

	When an MP3 player decodes the sound in the frame, it uses the global gain field to multiply the decoded sound samples by 2^(gain/4).		When an MP3 player decodes the sound in the frame, it uses the global gain field to multiply the decoded sound samples by 2^(gain/4).
	* If you add 1 to this field in all the MP3 frames, you effectively multiply the amplitude of the whole file by 2^(1/4) = 119% = +1.5 dB.		* If you add 1 to this field in all the MP3 frames, you effectively multiply the amplitude of the whole file by 2^(1/4) = 119 % = +1.5 dB.
	* Likewise, if you subtract 1 from this field, you multiply the amplitude by 2^(-1/4) = 84% = -1.5 dB.		* Likewise, if you subtract 1 from this field, you multiply the amplitude by 2^(-1/4) = 84 % = -1.5 dB.

	The way MP3Gain works actually has a very strong benefit: Since it is the data itself that is modified, MP3Gain does not require special support from players.		The way MP3Gain works actually has a very strong benefit: Since it is the data itself that is modified, MP3Gain does not require special support from players.

			== Links ==
	==Links==
	* [http://mp3gain.sourceforge.net/ MP3Gain's official website]		* [http://mp3gain.sourceforge.net/ MP3Gain's official website]
	* [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=3274 MP3Gain tutorial] on HA Forums		* [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=3274 MP3Gain tutorial] on HA Forums

Pepoluan: Category:Software

2006-09-06T23:03:11Z

Category:Software

← Older revision		Revision as of 23:03, 6 September 2006
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	* [http://mp3gain.sourceforge.net/ MP3Gain's official website]		* [http://mp3gain.sourceforge.net/ MP3Gain's official website]
	* [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=3274 MP3Gain tutorial] on HA Forums		* [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=3274 MP3Gain tutorial] on HA Forums


			[[Category:Software]]

Kjoonlee: MP3Gain is RG.

2006-08-20T06:04:23Z

MP3Gain *is* RG.

← Older revision		Revision as of 06:04, 20 August 2006
Line 1:		Line 1:
	'''MP3Gain''' is a program that analyzes [[MP3]] files to determine how loud they sound to the human ear. It can then adjust the [[MP3]] files so that they all have the same loudness without any quality loss. This way, you don't have to keep reaching for the volume dial on your [[MP3]] player every time it switches to a new song.		'''MP3Gain''' is a program that analyzes [[MP3]] files to determine how loud they sound to the human ear. It can then adjust the [[MP3]] files so that they all have the same loudness without any quality loss. This way, you don't have to keep reaching for the volume dial on your [[MP3]] player every time it switches to a new song.

	~~The principle behind~~ MP3Gain is ~~similar to~~ [[Replaygain]]~~. And like Replaygain~~, ~~MP3Gain also support~~ Track mode and Album mode.		MP3Gain is an implementation of [[Replaygain]], supporting Track mode and Album mode. However, with most other formats, the necessary loudness adjustment of Replaygain is stored as metadata, thus leaving the encoded results alone. With MP3Gain, the loudness adjustment is done on the data itself, albeit in a lossless/reversible way. Another difference with MP3Gain is the fact that it can only adjust physical volume in 1.5 dB steps.

	~~The difference lies in how it is implemented. With 'standard' Replaygain~~, the necessary loudness adjustment is stored as a metadata, thus leaving the ~~encoding result~~ alone. With MP3Gain, the loudness adjustment is done on the data itself, albeit in a lossless/~~'''~~reversible~~'''~~ way.

	Another difference is the ~~limitation of MP3Gain~~ that can adjust ~~only~~ in 1.5 dB steps.


	==Technical Explanation==		==Technical Explanation==
Line 12:		Line 7:
	Here's the technical reason on why it's lossless (despite operating on the data itself), and also why the smallest change possible is 1.5 dB:		Here's the technical reason on why it's lossless (despite operating on the data itself), and also why the smallest change possible is 1.5 dB:

	The MP3 format stores the sound information in small chunks called "frames". Each frame represents a fraction of a second of sound. In each frame there is a "global gain" field. This field is an 8-bit integer ~~(so its value~~ can ~~be a whole number~~ from 0 to 255).		The MP3 format stores the sound information in small chunks called "frames". Each frame represents a fraction of a second of sound. In each frame there is a "global gain" field. This field holds an 8-bit integer which can represent values from 0 to 255.

	When an MP3 player decodes the sound in the frame, it uses the global gain field to multiply the decoded sound samples by 2^(gain/4).		When an MP3 player decodes the sound in the frame, it uses the global gain field to multiply the decoded sound samples by 2^(gain/4).
Line 18:		Line 13:
	* Likewise, if you subtract 1 from this field, you multiply the amplitude by 2^(-1/4) = 84% = -1.5 dB.		* Likewise, if you subtract 1 from this field, you multiply the amplitude by 2^(-1/4) = 84% = -1.5 dB.

			The way MP3Gain works actually has a very strong benefit: Since it is the data itself that is modified, MP3Gain does not require special support from players.
	The way MP3Gain works actually has a very strong benefit: Since it is the data itself that is modified, ~~'''~~MP3Gain does not require special support from players~~''', quite unlike Replaygain~~.

Pepoluan: Add Tutorial link

2006-03-24T23:43:15Z

Add Tutorial link

← Older revision		Revision as of 23:43, 24 March 2006
Line 24:		Line 24:
	==Links==		==Links==
	* [http://mp3gain.sourceforge.net/ MP3Gain's official website]		* [http://mp3gain.sourceforge.net/ MP3Gain's official website]
			* [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=3274 MP3Gain tutorial] on HA Forums

Pepoluan: Taken from mp3gain's help file

2006-03-24T23:26:22Z

Taken from mp3gain's help file

New page

'''MP3Gain''' is a program that analyzes [[MP3]] files to determine how loud they sound to the human ear. It can then adjust the [[MP3]] files so that they all have the same loudness without any quality loss. This way, you don't have to keep reaching for the volume dial on your [[MP3]] player every time it switches to a new song.

The principle behind MP3Gain is similar to [[Replaygain]]. And like Replaygain, MP3Gain also support Track mode and Album mode.

The difference lies in how it is implemented. With 'standard' Replaygain, the necessary loudness adjustment is stored as a metadata, thus leaving the encoding result alone. With MP3Gain, the loudness adjustment is done on the data itself, albeit in a lossless/'''reversible''' way.

Another difference is the limitation of MP3Gain that can adjust only in 1.5 dB steps.

==Technical Explanation==

Here's the technical reason on why it's lossless (despite operating on the data itself), and also why the smallest change possible is 1.5 dB:

The MP3 format stores the sound information in small chunks called "frames". Each frame represents a fraction of a second of sound. In each frame there is a "global gain" field. This field is an 8-bit integer (so its value can be a whole number from 0 to 255).

When an MP3 player decodes the sound in the frame, it uses the global gain field to multiply the decoded sound samples by 2^(gain/4).
* If you add 1 to this field in all the MP3 frames, you effectively multiply the amplitude of the whole file by 2^(1/4) = 119% = +1.5 dB.
* Likewise, if you subtract 1 from this field, you multiply the amplitude by 2^(-1/4) = 84% = -1.5 dB.

The way MP3Gain works actually has a very strong benefit: Since it is the data itself that is modified, '''MP3Gain does not require special support from players''', quite unlike Replaygain.

==Links==
* [http://mp3gain.sourceforge.net/ MP3Gain's official website]