Amplify - Revision history

Reel.Deal: add link to avs+ documentation

2022-09-18T03:32:52Z

add link to avs+ documentation

← Older revision		Revision as of 05:32, 18 September 2022
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	<div style="max-width:62em" >		<div style="max-width:62em" >

			<div {{BlueBox2\|40\|0\|3px solid purple}} >
			{{AvsPlusFullname}}<br>
			Up-to-date documentation: [https://avisynthplus.readthedocs.io/en/latest/avisynthdoc/corefilters/amplify.html https://avisynthplus.readthedocs.io]
			</div>


	These filters amplify the audio of the clip by the prescribed amount. You can specify different {{FuncArg\|amount}} arguments for each channel. If there are more arguments than there are channels, the extra ones are ignored. If there are fewer arguments than channels, the last one is applied to the rest of the channels.		These filters amplify the audio of the clip by the prescribed amount. You can specify different {{FuncArg\|amount}} arguments for each channel. If there are more arguments than there are channels, the extra ones are ignored. If there are fewer arguments than channels, the last one is applied to the rest of the channels.

Raffriff42: one more touch-up

2016-02-27T21:07:46Z

one more touch-up

← Older revision		Revision as of 23:07, 27 February 2016
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			<div style="max-width:62em" >
	These filters amplify the audio of the clip by the prescribed amount. You can specify different {{FuncArg\|amount}} arguments for each channel. If there are more arguments than there are channels, the extra ones are ignored. If there are fewer arguments than channels, the last one is applied to the rest of the channels.		These filters amplify the audio of the clip by the prescribed amount. You can specify different {{FuncArg\|amount}} arguments for each channel. If there are more arguments than there are channels, the extra ones are ignored. If there are fewer arguments than channels, the last one is applied to the rest of the channels.

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	The relation between ''linear'' and ''decibel'' gain control is:		The relation between ''linear'' and ''decibel'' gain control is:
	::~~{{Serif\|~~lin}} = ~~{{Serif\|~~10}}<sup> ~~{{Serif\|~~(dB / 20)}}</sup>		::'''lin''' = 10<sup> ('''dB'''/20)</sup>
	::~~{{Serif\|~~dB}} = ~~{{Serif\|~~20}} '''·''' ~~{{Serif\|~~log}}<sub>~~{{Serif\|~~10}}</sub>~~{{Serif\|~~(lin)}}		::'''dB''' = 20'''·'''log<sub>10</sub>('''lin''')
	For example,		For example,
	:*<tt>AmplifyDB(  0.0)</tt> ''is equivalent to''  <tt>Amplify(1.0) </tt> (no change)		:*<tt>AmplifyDB(  0.0)</tt> ''is equivalent to''  <tt>Amplify(1.0) </tt> (no change)
	:*<tt>AmplifyDB(  6.0)</tt> ''is equivalent to''  <tt>Amplify(2.0) </tt> (about twice as loud)		:*<tt>AmplifyDB(  6.0)</tt> ''is equivalent to''  <tt>Amplify(2.0) </tt> (about twice as loud)
	:*<tt>AmplifyDB( -6.0)</tt> ''is equivalent to''  <tt>Amplify(0.5) </tt> (about half as loud)		:*<tt>AmplifyDB( -6.0)</tt> ''is equivalent to''  <tt>Amplify(0.5) </tt> (about half as loud)
	:*<tt>AmplifyDB( 20.0)</tt> ''is equivalent to''  <tt>Amplify(10) </tt> (much louder)		:*<tt>AmplifyDB( 20.0)</tt> ''is equivalent to''  <tt>Amplify(10)  </tt> (much louder)
	:*<tt>AmplifyDB(-20.0)</tt> ''is equivalent to''  <tt>Amplify(0.1)</tt> (much softer)		:*<tt>AmplifyDB(-20.0)</tt> ''is equivalent to''  <tt>Amplify(0.1) </tt> (much softer)


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	:*<tt>AmplifyDB(+3, 0)</tt> increases the volume of the left channel by a small amount.		:*<tt>AmplifyDB(+3, 0)</tt> increases the volume of the left channel by a small amount.
	:*<tt>Amplify(-1, 1)</tt> inverts the phase of the left channel. See Wikipedia: [[Wikipedia:Out_Of_Phase_Stereo\|Out Of Phase Stereo]].		:*<tt>Amplify(-1, 1)</tt> inverts the phase of the left channel. See Wikipedia: [[Wikipedia:Out_Of_Phase_Stereo\|Out Of Phase Stereo]].


	==== See Also ====		==== See Also ====
	* [[Normalize]] - with ''show=true'', can show the maximum amplification possible without [[Wikipedia:Clipping_%28audio%29\|clipping]].		* [[Normalize]] - with ''show=true'', can show the maximum amplification possible without [[Wikipedia:Clipping_%28audio%29\|clipping]].

			</div>
	[[Category:Internal filters]]		[[Category:Internal filters]]
	[[Category:Audio_filters]]		[[Category:Audio_filters]]

Admin at 21:25, 16 January 2016

2016-01-16T21:25:32Z

← Older revision		Revision as of 23:25, 16 January 2016
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	:*<tt>AmplifyDB(  6.0)</tt> ''is equivalent to''  <tt>Amplify(2.0) </tt> (about twice as loud)		:*<tt>AmplifyDB(  6.0)</tt> ''is equivalent to''  <tt>Amplify(2.0) </tt> (about twice as loud)
	:*<tt>AmplifyDB( -6.0)</tt> ''is equivalent to''  <tt>Amplify(0.5) </tt> (about half as loud)		:*<tt>AmplifyDB( -6.0)</tt> ''is equivalent to''  <tt>Amplify(0.5) </tt> (about half as loud)
	:*<tt>AmplifyDB( 20.0)</tt> ''is equivalent to''  <tt>Amplify(~~100~~) </tt> (much louder)		:*<tt>AmplifyDB( 20.0)</tt> ''is equivalent to''  <tt>Amplify(10) </tt> (much louder)
	:*<tt>AmplifyDB(-20.0)</tt> ''is equivalent to''  <tt>Amplify(0.01)</tt> (much softer)		:*<tt>AmplifyDB(-20.0)</tt> ''is equivalent to''  <tt>Amplify(0.1)</tt> (much softer)

Raffriff42: formatting, links, phrasing

2016-01-13T22:22:59Z

formatting, links, phrasing

@@ Line 1: / Line 1: @@
-{{Template:Func4Def|Amplify(clip, float ''amount1'' ''[, ...]'')|Amplify(clip, float ''left'', float ''right'')|AmplifydB(clip, float ''amount1'' ''[, ...]'')|AmplifydB(clip, float ''left'', float ''right'')}}
+These filters amplify the audio of the clip by the prescribed amount. You can specify different {{FuncArg|amount}} arguments for each channel. If there are more arguments than there are channels, the extra ones are ignored. If there are fewer arguments than channels, the last one is applied to the rest of the channels.
-These filters amplify the audio of the clip by the prescribed amount.
+bit and 24bit audio is converted to [[Float|float]]; the other audio formats are kept as they are. See [[ConvertAudio]].
-:*Negative scale factors will shift the phase by 180 degrees (i.e. invert the samples)
+{{FuncDefH4|Amplify}}
-'''AmplifyDB''' is the same, except values are in [[wikipedia:Decibel|decibels]] (dB). The relation between them is 'amount = 10^(decibels/20)'. You use negative dB values for reducing volume.
+:{{Par2|amount|float|1.0}}
-You can specify different factors for each channel. If there are more volumes than there are channels, the extra volume arguments are ignored. If there are fewer volumes than channels, the last volume is applied to the rest of the channels.
+{{FuncDefH4|AmplifyDB}}
-bit and 24bit Audio samples are converted to float in the process, the other audio formats are kept.
+:{{Par2|amount|float|0.0}}
 [[Category:Internal filters]]
 [[Category:Audio_filters]]

Raffriff42: added category

2015-11-08T15:21:25Z

added category

← Older revision		Revision as of 17:21, 8 November 2015
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	[[Category:Internal filters]]		[[Category:Internal filters]]
			[[Category:Audio_filters]]

Admin: please don't put stuff in comments; just ask or add a todo line if you are not sure about something

2015-09-06T21:39:35Z

please don't put stuff in comments; just ask or add a todo line if you are not sure about something

← Older revision		Revision as of 23:39, 6 September 2015
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	{{Template:Func4Def\|Amplify(clip, float ''amount1'' ''[, ...]'')\|Amplify(clip, float ''left'', float ''right'')\|AmplifydB(clip, float ''amount1'' ''[, ...]'')\|AmplifydB(clip, float ''left'', float ''right'')}}		{{Template:Func4Def\|Amplify(clip, float ''amount1'' ''[, ...]'')\|Amplify(clip, float ''left'', float ''right'')\|AmplifydB(clip, float ''amount1'' ''[, ...]'')\|AmplifydB(clip, float ''left'', float ''right'')}}

			These filters amplify the audio of the clip by the prescribed amount.

	'''Amplify''' multiplies the audio samples by ''amount''. You use scale factors between 0 and 1 for reducing volume.		'''Amplify''' multiplies the audio samples by ''amount''. You use scale factors between 0 and 1 for reducing volume.
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	:*Negative scale factors will shift the phase by 180 degrees (i.e. invert the samples)		:*Negative scale factors will shift the phase by 180 degrees (i.e. invert the samples)

			'''AmplifyDB''' is the same, except values are in [[wikipedia:Decibel\|decibels]] (dB). The relation between them is 'amount = 10^(decibels/20)'. You use negative dB values for reducing volume.

	~~'''~~AmplifyDB~~'''~~ is ~~the same, except values are in [[wikipedia:Decibel\|decibels]]~~ (dB)~~. You use negative dB values for reducing volume.~~		:*<code>AmplifyDB( 6.0)</code> is equivalent to <code>Amplify(2.0)</code>
			:*<code>AmplifyDB( 0.0)</code> is equivalent to <code>Amplify(1.0)</code>
	:*<code>AmplifyDB( 6.0)</code> is equivalent to <code>Amplify(2.0)</code>
	:*<code>AmplifyDB(-6.0)</code> is equivalent to <code>Amplify(0.5)</code>		:*<code>AmplifyDB(-6.0)</code> is equivalent to <code>Amplify(0.5)</code>


	You can specify different factors for each channel. If there are more volumes than there are channels, the extra volume arguments are ignored. If there are fewer volumes than channels, the last volume is applied to the rest of the channels.		You can specify different factors for each channel. If there are more volumes than there are channels, the extra volume arguments are ignored. If there are fewer volumes than channels, the last volume is applied to the rest of the channels.

	~~<!--~~ Audio samples are converted to ~~16 bits~~ in the process. ~~-->~~		8bit and 24bit Audio samples are converted to float in the process, the other audio formats are kept.

	[[Category:Internal filters]]		[[Category:Internal filters]]

Raffriff42: clarify AmplifyDB w/ examples; clarify negative scale factor; delete obsolete "converted to 16 bits in the process"

2015-08-31T22:48:18Z

clarify AmplifyDB w/ examples; clarify negative scale factor; delete obsolete "converted to 16 bits in the process"

← Older revision		Revision as of 00:48, 1 September 2015
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	{{Template:Func4Def\|Amplify(clip, float ''amount1'' ''[, ...]'')\|Amplify(clip, float ''left'', float ''right'')\|AmplifydB(clip, float ''amount1'' ''[, ...]'')\|AmplifydB(clip, float ''left'', float ''right'')}}		{{Template:Func4Def\|Amplify(clip, float ''amount1'' ''[, ...]'')\|Amplify(clip, float ''left'', float ''right'')\|AmplifydB(clip, float ''amount1'' ''[, ...]'')\|AmplifydB(clip, float ''left'', float ''right'')}}

	~~Amplify multiplies the audio samples by ''amount''. You can specify different factors for each channel.~~
	~~If there are more volumes than there are channels, they are ignored. If there are fewer volumes than channels, the last volume is applied to the rest of the channels.~~

	~~AmplifydB is~~ the ~~same except values are in decibels (dB)~~. You ~~can~~ use ~~negative dB values (or~~ scale factors between 0 and 1) for reducing volume~~. Negative scale factors will shift the phase by 180 degrees (i.e. invert the samples)~~.		'''Amplify''' multiplies the audio samples by ''amount''. You use scale factors between 0 and 1 for reducing volume.

	~~Audio samples are converted to 16 bits in~~ the ~~process~~.		:*Negative scale factors will shift the phase by 180 degrees (i.e. invert the samples)


			'''AmplifyDB''' is the same, except values are in [[wikipedia:Decibel\|decibels]] (dB). You use negative dB values for reducing volume.

			:*<code>AmplifyDB( 6.0)</code> is equivalent to <code>Amplify(2.0)</code>
			:*<code>AmplifyDB(-6.0)</code> is equivalent to <code>Amplify(0.5)</code>


			You can specify different factors for each channel. If there are more volumes than there are channels, the extra volume arguments are ignored. If there are fewer volumes than channels, the last volume is applied to the rest of the channels.

			<!-- Audio samples are converted to 16 bits in the process. -->

	[[Category:Internal filters]]		[[Category:Internal filters]]

Admin: 1 revision

2013-05-09T15:02:24Z

1 revision

← Older revision	Revision as of 17:02, 9 May 2013
(No difference)

Wilbert at 19:29, 29 March 2006

2006-03-29T19:29:32Z

New page

{{Template:Func4Def|Amplify(clip, float ''amount1'' ''[, ...]'')|Amplify(clip, float ''left'', float ''right'')|AmplifydB(clip, float ''amount1'' ''[, ...]'')|AmplifydB(clip, float ''left'', float ''right'')}}

Amplify multiplies the audio samples by ''amount''. You can specify different factors for each channel.
If there are more volumes than there are channels, they are ignored. If there are fewer volumes than channels, the last volume is applied to the rest of the channels.

AmplifydB is the same except values are in decibels (dB). You can use negative dB values (or scale factors between 0 and 1) for reducing volume. Negative scale factors will shift the phase by 180 degrees (i.e. invert the samples).

Audio samples are converted to 16 bits in the process.

[[Category:Internal filters]]