FAQ - Revision history

Jensend: /* General Audio Compression */ fix spelling error, fudge slightly because of MP3 Surround (which few actually use)

2012-03-01T23:04:04Z

General Audio Compression: fix spelling error, fudge slightly because of MP3 Surround (which few actually use)

← Older revision		Revision as of 23:04, 1 March 2012
Line 19:		Line 19:


	;Does encoding ~~preserves~~ surround info?		;Does encoding preserve surround info?
	:'''Short Answer:''' Depends. MP3 destroys surround sound information. Go see the page on [[lossy]] encoding.		:'''Short Answer:''' Depends. Normal MP3 encoding destroys surround sound information. Go see the page on [[lossy]] encoding.
	:In addition, check the following links:		:In addition, check the following links:
	:* [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=4639 Experience of a HA Member with Rear Channel] on the HA Forums		:* [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=4639 Experience of a HA Member with Rear Channel] on the HA Forums
Line 61:		Line 61:
	:Unfortunately, not at this time. While it is true that compressed video can often use filtering or [[post processing]] during playback to improve image quality, the same cannot be said for audio. Video can be smoothed out, but audio cannot. There is also no data that can be recovered from the compressed audio--the artifacts are present because the original data isn't there anymore!		:Unfortunately, not at this time. While it is true that compressed video can often use filtering or [[post processing]] during playback to improve image quality, the same cannot be said for audio. Video can be smoothed out, but audio cannot. There is also no data that can be recovered from the compressed audio--the artifacts are present because the original data isn't there anymore!
	:The following Hydrogenaudio thread has more information: [http://www.hydrogenaudio.org/index.php?showtopic=6729 MP3 Post Processing]		:The following Hydrogenaudio thread has more information: [http://www.hydrogenaudio.org/index.php?showtopic=6729 MP3 Post Processing]


	=MP3-related=		=MP3-related=

Jensend: /* General Hydrogenaudio Etiquette */ mention TOS 8 page

2012-03-01T22:58:17Z

General Hydrogenaudio Etiquette: mention TOS 8 page

← Older revision		Revision as of 22:58, 1 March 2012
Line 11:		Line 11:
	;Why [http://www.hydrogenaudio.org/forums/index.php?showtopic=3974 TOS #8]?		;Why [http://www.hydrogenaudio.org/forums/index.php?showtopic=3974 TOS #8]?
	:'''Short Answer:''' The usual "audiophile" speak of non-audio related terms which are completely subjective and open to redefinition on a whim, are useless for any sort of progression in discussion.		:'''Short Answer:''' The usual "audiophile" speak of non-audio related terms which are completely subjective and open to redefinition on a whim, are useless for any sort of progression in discussion.
	:For ~~a deeper,~~ thoughtful ~~answer~~, see [http://www.hydrogenaudio.org/forums/index.php?showtopic=11442 this ~~thread~~.]		:For more detailed and thoughtful answers, see the description of [[TOS 8]] on this wiki or [http://www.hydrogenaudio.org/forums/index.php?showtopic=11442 this forum discussion.]


	=General Audio Compression=		=General Audio Compression=

Pepoluan: Category:Guides

2006-09-15T15:30:00Z

Category:Guides

← Older revision		Revision as of 15:30, 15 September 2006
Line 81:		Line 81:


	~~{{stub}}~~		[[Category:Guides]]

Pepoluan at 22:14, 6 September 2006

2006-09-06T22:14:55Z

← Older revision		Revision as of 22:14, 6 September 2006
Line 57:		Line 57:
	:* [http://www.hydrogenaudio.org/forums/index.php?showtopic=7834&st=0&p=77265&#entry77265 Confusion on CBR & VBR thread] on the HA Forums		:* [http://www.hydrogenaudio.org/forums/index.php?showtopic=7834&st=0&p=77265&#entry77265 Confusion on CBR & VBR thread] on the HA Forums
	:* ... and [http://www.hydrogenaudio.org/forums/index.php?showtopic=42646&hl= this thread] for a more sarcastic discussion.		:* ... and [http://www.hydrogenaudio.org/forums/index.php?showtopic=42646&hl= this thread] for a more sarcastic discussion.


			;Is there a way to filter or remove artifacts from poorly-compressed audio?
			:Unfortunately, not at this time. While it is true that compressed video can often use filtering or [[post processing]] during playback to improve image quality, the same cannot be said for audio. Video can be smoothed out, but audio cannot. There is also no data that can be recovered from the compressed audio--the artifacts are present because the original data isn't there anymore!
			:The following Hydrogenaudio thread has more information: [http://www.hydrogenaudio.org/index.php?showtopic=6729 MP3 Post Processing]


Line 66:		Line 71:

	;Why is joint stereo better than pure stereo ?		;Why is joint stereo better than pure stereo ?
	:You better [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=683 start ~~here~~] ~~(thread on the HA Forums)~~		:You better [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=683 start from this HA thread]

Pepoluan at 23:40, 24 March 2006

2006-03-24T23:40:23Z

← Older revision		Revision as of 23:40, 24 March 2006
Line 60:		Line 60:

	=MP3-related=		=MP3-related=

			;What is MP3Gain? How do I use it? Is it the same as ReplayGain, but for MP3 only?
			:Go check [[MP3Gain\|this page]].


	;Why is joint stereo better than pure stereo ?		;Why is joint stereo better than pure stereo ?

Pepoluan at 22:34, 24 March 2006

2006-03-24T22:34:00Z

← Older revision		Revision as of 22:34, 24 March 2006
Line 4:		Line 4:

	Please note that this FAQ provides very short answers; explore the links to get deeper information.		Please note that this FAQ provides very short answers; explore the links to get deeper information.


			=General Hydrogenaudio Etiquette=

			;Why do you stress blind listening / [[ABX]] tests so much?
			;Why [http://www.hydrogenaudio.org/forums/index.php?showtopic=3974 TOS #8]?
			:'''Short Answer:''' The usual "audiophile" speak of non-audio related terms which are completely subjective and open to redefinition on a whim, are useless for any sort of progression in discussion.
			:For a deeper, thoughtful answer, see [http://www.hydrogenaudio.org/forums/index.php?showtopic=11442 this thread.]

Pepoluan at 22:18, 23 March 2006

2006-03-23T22:18:56Z

← Older revision		Revision as of 22:18, 23 March 2006
Line 57:		Line 57:


			=CD-Drives=

	~~=Quality=~~		;How do I test my drive's C2 accuracy?
			:Visit [http://www.exactaudiocopy.de/eac13.html this page].

	~~==Simple==~~

	* What do I need to get started?
	* What is [[ABX]]?
	* Why is [[ABX]] needed?

	~~==Advanced==~~

	* What are good test procedures?

	{{stub}}		{{stub}}

Pepoluan at 22:06, 23 March 2006

2006-03-23T22:06:10Z

← Older revision		Revision as of 22:06, 23 March 2006
Line 7:		Line 7:

	=General Audio Compression=		=General Audio Compression=


	;Can I increase quality by converting a lossy compressed file to a higher-bitrate lossy compressed file?		;Can I increase quality by converting a lossy compressed file to a higher-bitrate lossy compressed file?
Line 14:		Line 13:

	;Does encoding preserves surround info?		;Does encoding preserves surround info?
	:'''Short Answer:''' MP3 destroys surround sound information.		:'''Short Answer:''' Depends. MP3 destroys surround sound information. Go see the page on [[lossy]] encoding.
	:In addition, check the following links:		:In addition, check the following links:
	:* [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=4639 Experience of a HA Member with Rear Channel] on the HA Forums		:* [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=4639 Experience of a HA Member with Rear Channel] on the HA Forums

Pepoluan: Many changes. See diff.

2006-03-23T20:50:49Z

Many changes. See diff.

← Older revision		Revision as of 20:50, 23 March 2006
Line 1:		Line 1:
	{{stub}}		{{stub}}

	This is a list of ''Frequently Asked Questions''. The questions are grouped according to their categories.		This is a list of ''Frequently Asked Questions''. The questions are grouped according to their categories, then sorted alphabetically.

	Please note that this FAQ provides very short answers; explore the links to get deeper information.		Please note that this FAQ provides very short answers; explore the links to get deeper information.
Line 7:		Line 7:

	=General Audio Compression=		=General Audio Compression=


			;Can I increase quality by converting a lossy compressed file to a higher-bitrate lossy compressed file?
			:'''Short Answer:''' This is called [[Transcoding]], and the answer is '''no'''.


Line 13:		Line 17:
	:In addition, check the following links:		:In addition, check the following links:
	:* [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=4639 Experience of a HA Member with Rear Channel] on the HA Forums		:* [http://www.hydrogenaudio.org/forums/index.php?act=ST&f=15&t=4639 Experience of a HA Member with Rear Channel] on the HA Forums


			;What is the best audio format?
			:'''Short Answer:''' Depends on your needs.
			:For a detailed explanation, see [[Audio format guide]].


			;Why do encoded files get clipped when the original WAVs are not clipped?
			:'''Short answer:'''
			:#Quantization errors may cause the signal to clip, and
			:#Gibbs phenomenon through the limitation of bandwidth may cause the signal to clip.
			:Check the following links for more details:
			:* [http://ff123.net/norm.html Explanation on ff123's site]


Line 21:		Line 38:


	;Why not use graphs to compare codecs?		;What is "transparency"?
			:Go see [[transparency]]


			;Why not use graphs / frequency analysis to compare codecs?
	:Nothing can be said about quality or audible difference by looking at pictures, because a [[lossy]] encoder works by removing as much inaudible sounds as possible. A lack of frequencies can well mean that some audible parts are missing (bad work, or too low setting), or that the encoder managed a very good compression, removing a lot of useless things.		:Nothing can be said about quality or audible difference by looking at pictures, because a [[lossy]] encoder works by removing as much inaudible sounds as possible. A lack of frequencies can well mean that some audible parts are missing (bad work, or too low setting), or that the encoder managed a very good compression, removing a lot of useless things.
	:In addition, check the following links:		:In addition, check the following links:
	:* [[lossy\|Lossy]] encoding		:* [[lossy\|Lossy]] encoding
	:* [[lossless\|Lossless]] encoding		:* [[lossless\|Lossless]] encoding
			:* [[frequency analysis]]
	:* [http://www.hydrogenaudio.org/forums/index.php?showtopic=7834&st=0&p=77265&#entry77265 Confusion on CBR & VBR thread] on the HA Forums		:* [http://www.hydrogenaudio.org/forums/index.php?showtopic=7834&st=0&p=77265&#entry77265 Confusion on CBR & VBR thread] on the HA Forums
			:* ... and [http://www.hydrogenaudio.org/forums/index.php?showtopic=42646&hl= this thread] for a more sarcastic discussion.


Line 41:		Line 64:

	* What do I need to get started?		* What do I need to get started?
	* What is transparency/cd-quality?
	* What are the best formats?
	* How do you tell what is the best format?
	~~: See [[Audio format guide]]~~

	* What is [[ABX]]?		* What is [[ABX]]?
	* Why is [[ABX]] needed?		* Why is [[ABX]] needed?
	* [[Transcoding]] - Can I increase quality by converting X lossy compressed file to Y lossy compressed file?

	==Advanced==		==Advanced==

	* Can I use [[frequency analysis]] or other tools to judge quality?
	* What are good test procedures?		* What are good test procedures?

	{{stub}}		{{stub}}

Pepoluan: Major Re-write! According to HA FAQ... partially done... help!

2006-03-21T19:33:11Z

Major Re-write! According to HA FAQ... partially done... help!

@@ Line 1: / Line 1: @@
 =Quality=
@@ Line 17: / Line 54: @@
 * Can I use [[frequency analysis]] or other tools to judge quality?
 * What are good test procedures?