ABX - Revision history

Username4129: moved a comma. sorry for being picky.

2022-05-27T18:42:27Z

moved a comma. sorry for being picky.

← Older revision		Revision as of 18:42, 27 May 2022
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	'''ABX''' is a method for determining by listening whether two wav files are audibly different from each other. The method is most useful for listening to potential differences near the threshold of audibility. A key feature of this method is that the tests are performed "[[blind test\|blind]]," or without the listener's knowledge of what the file-under-test is. Another key feature is that the influence of chance on the results can be reduced by performing multiple tests (trials).		'''ABX''' is a method for determining by listening whether two wav files are audibly different from each other. The method is most useful for listening to potential differences near the threshold of audibility. A key feature of this method is that the tests are performed "[[blind test\|blind]]", or without the listener's knowledge of what the file-under-test is. Another key feature is that the influence of chance on the results can be reduced by performing multiple tests (trials).

	The tester assigns one file to the "a" button, the other file to the "b" button, and then the abx program randomly assigns either the first or the second file to the "x" button. The listener can listen to a, b, or x, in any order, as many times as they wish, then decides whether x is the same as a or the same as b. That's one trial.		The tester assigns one file to the "a" button, the other file to the "b" button, and then the abx program randomly assigns either the first or the second file to the "x" button. The listener can listen to a, b, or x, in any order, as many times as they wish, then decides whether x is the same as a or the same as b. That's one trial.

Username4129: grammar change?

2022-05-27T18:41:48Z

grammar change?

← Older revision		Revision as of 18:41, 27 May 2022
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	'''ABX''' is a method for determining by listening whether two wav files are audibly different from each other. The method is most useful for listening to potential differences near the threshold of audibility. A key feature of this method is that the tests are performed "[[blind test\|blind]]," or without the listener's knowledge of what the file-under-test is. Another key feature is that the influence of chance on the results can be reduced by performing multiple tests (trials).		'''ABX''' is a method for determining by listening whether two wav files are audibly different from each other. The method is most useful for listening to potential differences near the threshold of audibility. A key feature of this method is that the tests are performed "[[blind test\|blind]]," or without the listener's knowledge of what the file-under-test is. Another key feature is that the influence of chance on the results can be reduced by performing multiple tests (trials).

	The tester assigns one file to the "a" button, the other file to the "b" button, and then the abx program randomly assigns either the first or the second file to the "x" button. The listener can listen to a, b, or x, in any order, as many times as ~~he wishes~~, then decides whether x is the same as a or the same as b. That's one trial.		The tester assigns one file to the "a" button, the other file to the "b" button, and then the abx program randomly assigns either the first or the second file to the "x" button. The listener can listen to a, b, or x, in any order, as many times as they wish, then decides whether x is the same as a or the same as b. That's one trial.

	An ABX session consists of multiple trials to reduce the probability that a particular result is the result of chance rather than the listener actually hearing a difference. For example, if a listener correctly identifies x after only one trial, the probability of that occurring by chance is 50%. However, if the listener were to correctly identify x five times out of five trials, the probability of that occurring by chance is 0.5<sup>5</sup> = 0.03 (3%).		An ABX session consists of multiple trials to reduce the probability that a particular result is the result of chance rather than the listener actually hearing a difference. For example, if a listener correctly identifies x after only one trial, the probability of that occurring by chance is 50%. However, if the listener were to correctly identify x five times out of five trials, the probability of that occurring by chance is 0.5<sup>5</sup> = 0.03 (3%).

67.185.79.81: Math typesetting!

2014-06-22T19:04:50Z

Math typesetting!

← Older revision		Revision as of 19:04, 22 June 2014
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	The tester assigns one file to the "a" button, the other file to the "b" button, and then the abx program randomly assigns either the first or the second file to the "x" button. The listener can listen to a, b, or x, in any order, as many times as he wishes, then decides whether x is the same as a or the same as b. That's one trial.		The tester assigns one file to the "a" button, the other file to the "b" button, and then the abx program randomly assigns either the first or the second file to the "x" button. The listener can listen to a, b, or x, in any order, as many times as he wishes, then decides whether x is the same as a or the same as b. That's one trial.

	An ABX session consists of multiple trials to reduce the probability that a particular result is the result of chance rather than the listener actually hearing a difference. For example, if a listener correctly identifies x after only one trial, the probability of that occurring by chance is 50%. However, if the listener were to correctly identify x five times out of five trials, the probability of that occurring by chance is 0.5^5 = 0.03 (3%).		An ABX session consists of multiple trials to reduce the probability that a particular result is the result of chance rather than the listener actually hearing a difference. For example, if a listener correctly identifies x after only one trial, the probability of that occurring by chance is 50%. However, if the listener were to correctly identify x five times out of five trials, the probability of that occurring by chance is 0.5<sup>5</sup> = 0.03 (3%).

	ff123 has a <s>ff123 page</s> which calculates (by simulation) the type 1 error, or the probability of concluding that a perceptible difference exists when one does not:		ff123 has a <s>ff123 page</s> which calculates (by simulation) the type 1 error, or the probability of concluding that a perceptible difference exists when one does not:

67.161.116.213: added Lacinato ABX link

2014-04-21T23:51:03Z

added Lacinato ABX link

← Older revision		Revision as of 23:51, 21 April 2014
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	=Programs for Performing Blind Listening Tests=		=Programs for Performing Blind Listening Tests=

			* [http://lacinato.com/cm/software/othersoft/abx Lacinato ABX/Shootouter for Windows/Mac/Linux]
	* [http://www.foobar2000.org/components/view/foo_abx ABX Comparator (component for foobar2000)]		* [http://www.foobar2000.org/components/view/foo_abx ABX Comparator (component for foobar2000)]
	* [http://abx-comparator.berlios.de/ ABX-comparator for Linux/GNOME (no longer maintained)]		* [http://abx-comparator.berlios.de/ ABX-comparator for Linux/GNOME (no longer maintained)]

213.215.67.16: /* Programs for Performing Blind Listening Tests */

2013-09-21T17:54:02Z

Programs for Performing Blind Listening Tests

← Older revision		Revision as of 17:54, 21 September 2013
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	* [http://www.foobar2000.org/components/view/foo_abx ABX Comparator (component for foobar2000)]		* [http://www.foobar2000.org/components/view/foo_abx ABX Comparator (component for foobar2000)]
			* [http://abx-comparator.berlios.de/ ABX-comparator for Linux/GNOME (no longer maintained)]
			* [http://code.google.com/p/python-abx/ python-abx (abx-comparator clone)]
	* <s>WinABX/WinABA</s>		* <s>WinABX/WinABA</s>
	* <s>Blind Audio Comparison and Rating</s>		* <s>Blind Audio Comparison and Rating</s>
	* <s>PC ABX and ABX info</s>		* <s>PC ABX and ABX info</s>
	* [http://abx-comparator.berlios.de/ ABX-comparator for Linux/GNOME (no longer maintained)]
	* [http://code.google.com/p/python-abx/ python-abx (abx-comparator clone)]

213.215.67.16 at 17:52, 21 September 2013

2013-09-21T17:52:29Z

← Older revision		Revision as of 17:52, 21 September 2013
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	=Programs for Performing Blind Listening Tests=		=Programs for Performing Blind Listening Tests=

			* [http://www.foobar2000.org/components/view/foo_abx ABX Comparator (component for foobar2000)]
	* <s>WinABX/WinABA</s>		* <s>WinABX/WinABA</s>
	* <s>Blind Audio Comparison and Rating</s>		* <s>Blind Audio Comparison and Rating</s>

95.222.131.46: /* Programs for Performing Blind Listening Tests */ added link to python-abx, which works for me (while abx-comparator does not)

2013-03-08T01:56:51Z

Programs for Performing Blind Listening Tests: added link to python-abx, which works for me (while abx-comparator does not)

← Older revision		Revision as of 01:56, 8 March 2013
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	* <s>Blind Audio Comparison and Rating</s>		* <s>Blind Audio Comparison and Rating</s>
	* <s>PC ABX and ABX info</s>		* <s>PC ABX and ABX info</s>
	* [http://abx-comparator.berlios.de/ ABX-comparator for Linux/GNOME]		* [http://abx-comparator.berlios.de/ ABX-comparator for Linux/GNOME (no longer maintained)]
			* [http://code.google.com/p/python-abx/ python-abx (abx-comparator clone)]

87.112.81.64: Removed dead/broken links.

2012-12-20T22:03:52Z

Removed dead/broken links.

← Older revision		Revision as of 22:03, 20 December 2012
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	An ABX session consists of multiple trials to reduce the probability that a particular result is the result of chance rather than the listener actually hearing a difference. For example, if a listener correctly identifies x after only one trial, the probability of that occurring by chance is 50%. However, if the listener were to correctly identify x five times out of five trials, the probability of that occurring by chance is 0.5^5 = 0.03 (3%).		An ABX session consists of multiple trials to reduce the probability that a particular result is the result of chance rather than the listener actually hearing a difference. For example, if a listener correctly identifies x after only one trial, the probability of that occurring by chance is 50%. However, if the listener were to correctly identify x five times out of five trials, the probability of that occurring by chance is 0.5^5 = 0.03 (3%).

	ff123 has a ~~[http://~~ff123~~.net~~/~~abx/abx.html ff123 page]~~ which calculates (by simulation) the type 1 error, or the probability of concluding that a perceptible difference exists when one does not: ~~http://ff123.net/abx/abx.html~~		ff123 has a <s>ff123 page</s> which calculates (by simulation) the type 1 error, or the probability of concluding that a perceptible difference exists when one does not:

	''A difference is concluded to be heard when 13 correct identifications out of 16 trials is achieved. 0.01 is used as the critical type I error.''		''A difference is concluded to be heard when 13 correct identifications out of 16 trials is achieved. 0.01 is used as the critical type I error.''
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	=Programs for Performing Blind Listening Tests=		=Programs for Performing Blind Listening Tests=

	* ~~[http://www.kikeg.arrakis.es/winabx/~~ WinABX/WinABA]		* <s>WinABX/WinABA</s>
	* ~~[http://ff123.net/abchr/abchr.html ABC/HR~~ Blind Audio Comparison and Rating]		* <s>Blind Audio Comparison and Rating</s>
	* ~~[http://www.pcabx.com/~~ PC ABX and ABX info]		* <s>PC ABX and ABX info</s>
	* [http://abx-comparator.berlios.de/ ABX-comparator for Linux/GNOME]		* [http://abx-comparator.berlios.de/ ABX-comparator for Linux/GNOME]

HotshotGG: It appears as though we don't have reference template and footnotes aren't really that important so I am doing this for now

2008-06-05T06:58:43Z

It appears as though we don't have reference template and footnotes aren't really that important so I am doing this for now

← Older revision		Revision as of 06:58, 5 June 2008
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	In ''sensory evaluation techniques, 3rd ed.'', by Meilgaard, Civille, and Carr, this type of test is referred to as a "duo-trio," but the procedure is the inverse of the abx, and multiple people are used instead of multiple trials.		In ''sensory evaluation techniques, 3rd ed.'' [1] by Meilgaard, Civille, and Carr, this type of test is referred to as a "duo-trio," but the procedure is the inverse of the abx, and multiple people are used instead of multiple trials.
	: ''"Present to each subject an identified reference sample, followed by two coded samples, one of which matches the reference sample. Ask subjects to indicate which coded sample matches the reference. Count the number of correct replies and refer to table t10 for interpretation."''		: ''"Present to each subject an identified reference sample, followed by two coded samples, one of which matches the reference sample. Ask subjects to indicate which coded sample matches the reference. Count the number of correct replies and refer to table t10 for interpretation."''

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	* [http://abx-comparator.berlios.de/ ABX-comparator for Linux/GNOME]		* [http://abx-comparator.berlios.de/ ABX-comparator for Linux/GNOME]


			==Notes==
			1 ^ Sensory Evaluation Techniques. pg. 69-71.

	==References==		==References==

HotshotGG: /* References */

2008-06-05T06:54:22Z

References

← Older revision		Revision as of 06:54, 5 June 2008
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	==References==		==References==

	* Meilgaard, Morten, Gail Vance Civille, and B. Thomas Carr. Sensory Evaluation Techniques. CRC. June 1999. Edition: 3rd. ISBN: ~~978-0849302763~~		* Meilgaard, Morten, Gail Vance Civille, and B. Thomas Carr. Sensory Evaluation Techniques. CRC. June 1999. Edition: 3rd. ISBN: 9780849302763
	*ff123. ABX, Probability of Experiment Being the Same as Random Guesses. <u>Discussion Of Audio Compression.</u> July 23rd, 2002. (Accessed June 5, 2008)		*ff123. ABX, Probability of Experiment Being the Same as Random Guesses. <u>Discussion Of Audio Compression.</u> July 23rd, 2002. (Accessed June 5, 2008)

	[[Category:Listening Tests]]		[[Category:Listening Tests]]