Hydrogenaudio Knowledgebase - User contributions [en]

Hydrogenaudio Knowledgebase:Sandbox

2005-03-28T19:39:31Z

130.225.245.182:

Please note that all contributions to [[Topic_Index|Hydrogenaudio Knowledgebase]] are considered to be released under the [http://www.gnu.org/copyleft/fdl.html GNU Free Documentation License] (see [[Hydrogenaudio Knowledgebase:Copyrights|Hydrogenaudio Knowledgebase Copyrights]] for details). If you don't want your writing to be edited mercilessly and redistributed at will, then don't submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource. DO NOT SUBMIT COPYRIGHTED WORK WITHOUT PERMISSION !

<math>\sum_{n=0}^\infty \frac{x^n}{n!}</math>

Before we get started, are we happy with the [http://www.gnu.org/copyleft/fdl.html GNU FDL] as [http://www.wikipedia.org Wikipedia] uses? There are a lot of [http://home.twcny.rr.com/nerode/neroden/fdl.html reasons not to use it]; perhaps we shoud pick a more liberal [http://www.creativecommons.org Creative Commons] license instead? Even the GNU folks state:

"We believe that published software and documentation should be free software and free documentation. We recommend making all sorts of educational and reference works free also, using free documentation licenses such as the GNU Free Documentation License (GNU FDL). For other kinds of works, we recommend you consider the licenses proposed by Creative Commons." ([http://www.gnu.org/licenses/licenses.html#TOCOtherWorks source])

:If this is actually a concern, this issue needs to be raised on the forums, not here on this page. This page is for testing out wiki functionality, not for holding discussions. That is better done on either a different page, or in the wiki forum. -- Dibrom 12:58, 13 Oct 2004 (PDT)

[[MediaWiki:indexpage]]
[[MediaWiki:indexpage-url]]

blah test

{| align=center border="1" cellpadding="5" cellspacing="0"
|+'''How do i center my text'''
| A || Man || Eating || Duck
|-
| Duck || Eating || Man || A
|}

{| align=center border="1" cellpadding="5" cellspacing="0" style="text-align: center"
|+'''How do i center my text'''
| A || Man || Eating || Duck
|-
| Duck || Eating || Man || A
|}

bleh another test

XMPlay

2005-03-28T09:05:46Z

130.225.245.182:

'''[http://www.un4seen.com/xmplay.html XMPlay]''' is a freeware audio player from '''[http://www.un4seen.com un4seen developments]'''.

=== Details: ===
----
A small-footprint audio player which supports most audio formats, plugins, skins, global hotkeys and much more.

Replay Gain

2005-03-28T09:05:02Z

130.225.245.182: /* Windows */

=Introduction=
Replaygain calculates the average perceived loudness of either a track (track gain) or an album (album gain) and uses this information to properly adjust the volume of tracks, that are mastered at different volume levels, during playback. This will make sure that you will have a similar volume levels on all of your tracks or albums without losing any dynamic range of your music. In the case of Album Gain, it will even make sure that more quiet tracks of an album will sound more quiet and tracks that where meant to be louder, louder.
It shouldn't be confused with algorithms that adjust playback volume dynamically within a single track.

=Implementations=
There are different replaygain implementations, each with its own uses and strength. Most of them use [[meta data]] to indicate the level of the volume change (Volume is adjusted on playback; needs player/decoder support) others modify the Audio Data itself. Generally it is recommended to use an implementation which uses [[meta data]] and does not touch the audio itself.

Replaygain has significant advantages over normalizing. It allows the peak loudness of a song to be consistent over an entire collection of audio, much like normalizing (this is called 'Track Gain'). However, it also allows the peak loudness of an album to be consistent over a entire music collection, allowing the dynamics of album to remain (This is called 'Album Gain'). In a [[meta data]] based solution, information on both types of replaygain can be stored, and the desired playback effect can be switched back and forth in the appropriate player. However, if the audio is permanently modified, only one type of raplaygain can be chosen.

==MP3Gain==
[http://mp3gain.sourceforge.net/ MP3Gain]

Format: [[MP3]]

Method: Audio or Meta

* In Meta mode, the tags are written in [[APEv2]] tags.
* In Audio Data Mode, the gain is applied to each frame's gain byte, and the process can be perfectly reverted.

Limitations: Limited to 1.5db steps in Audio Data mode

==LAME==
[http://lame.sourceforge.net/ LAME]

Format: [[MP3]]

Method: Header ([http://gabriel.mp3-tech.org/mp3infotag.html mp3infotag])

Notes: Added during encoding; not supported by any player yet; Track Gain only

==Replaygain==
[http://rarewares.org/mpc.html MPC replaygain]

Format: MPC

Method: Header (similar to Meta data method. See "notes".)

Notes: Replaygain values are stored in the header and replaygain is part of the Musepack specifications; therefore any Musepack decoder that does not support replaygain can be considered broken.

==Vorbisgain==
[http://www.sjeng.org/vorbisgain.html Vorbisgain]

Format: [[Ogg Vorbis]]

Method: Meta (in [[Vorbis comment]])

==FLAC/metaflac==
[http://flac.sf.net FLAC]

Format: [[FLAC]]

Method: Meta (in [[Vorbis comment]])

==foobar2000 replaygain scanner==
[http://foobar2000.org Foobar2000]

Format:
* [[MP3]]: Values written to [[APEv2]] or [[ID3v2]] tags.
* [[MPC]]: Values written to header as decribed under "replaygain".
* [[Ogg Vorbis]]: In [[Vorbis comment]].
* [[AAC]]: Values written to [[APEv2]] tags.
* [[MP4]]: Uses its own itunes-compatible tagging system (though itunes does not support replaygain).
* [[FLAC]]: In [[Vorbis comment]].
* [[APE]]: Values written to [[APEv2]] tags.
* [[WAV]]: Optionally saved into [[APEv2]] tags; otherwise the foobar2000 database is used.
* Modules ([[MOD]] etc.): Optionally saved into [[APEv2]] tags; otherwise the foobar2000 database is used.

You can also choose to only have the replaygain values saved in the foobar2000 database and leave the files untouched.

All other formats are supported but the replaygain values are saved to the foobar2000 database.

==Wavegain==
[http://www.rarewares.org/files/others/wavegain.zip Wavegain]

Format: PCM Wave

Method: Audio

Limitations: Irreversible

=Players support=
Replaygain being present in the specs of flac, mpc and ape formats, any player that support those formats usually support replaygain.

The situation with MP3 is rather different, as it was not part of the mp3 specs. The APEv2 tags metadata implementation is somewhat becoming the de-facto standard.

==Windows==
* [[Foobar2000]] supports replaygain in all possible aspects. (it can also calculate replaygain)
* [[Winamp]]. MP3 replaygain support with adequate plugins (e.g. [http://www3.cypress.ne.jp/otachan/in_mpg123.html Otachan's in_mpg123] - if your japanese is not that good, you can find details [http://www.hydrogenaudio.org/forums/index.php?showtopic=18530 in this thread])
* [[XMPlay]] recently implemented replaygain

and probably others.

==Linux==
* [[XMMS]]. Reads replaygain from FLAC, MPC, ogg ..
For mp3, use the CVS version of the [http://xmms-mad.sourceforge.net/ xmms-mad] mp3 plugin (it's not yet released as binaries, furthermore not available in distribs' versions for now. Meanwhile binaries are available there : [http://perso.crans.org/~krempp/xmms-mad/ custom binaries])

and possibly others, since [http://developer.kde.org/~wheeler/taglib.html TagLib] added support for APEv2 tags in mp3 files, players using this library (like [[amarok]] and [[JuK]]) might support that kind of replaygain tags in the near future.

==Portable devices==
Sadly, none that I know of. So re-encoding (or using mp3gain) to attenuate the audio-data is the only solution.

The iPod features ''Soundcheck'', which seems to produce roughly the same normalization gains as replaygain, but doesnt provide an Album Gain.

=Additional reading=
* [http://replaygain.hydrogenaudio.org Original replaygain website] (this hasn't been updated since 2001, and everything there is outdated except for the description of the algorithm - but know that the 83dB SPL reference has since then be changed to 89 dB SPL ..)
* audio engineer Bob Katz's many interesting pages (e.g. [http://www.digido.com/portal/pmodule_id=11/pmdmode=fullscreen/pageadder_page_id=93/ this one]) is the best source to understand why replaygain is useful, and understand all that digital audio stuff. This actually was in part responsible for the design of replaygain by David Robinson in the first place, IIRC.

Hydrogenaudio Knowledgebase:Sandbox

2005-03-27T12:12:09Z

130.225.245.182:

Hydrogenaudio Knowledgebase:Sandbox

2005-03-27T12:11:44Z

130.225.245.182:

Please note that all contributions to [[Topic_Index|Hydrogenaudio Knowledgebase]] are considered to be released under the [http://www.gnu.org/copyleft/fdl.html GNU Free Documentation License] (see [[Hydrogenaudio Knowledgebase:Copyrights|Hydrogenaudio Knowledgebase Copyrights]] for details). If you don't want your writing to be edited mercilessly and redistributed at will, then don't submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource. DO NOT SUBMIT COPYRIGHTED WORK WITHOUT PERMISSION !

<math>\sum_{n=0}^\infty \frac{x^n}{n!}</math>

Before we get started, are we happy with the [http://www.gnu.org/copyleft/fdl.html GNU FDL] as [http://www.wikipedia.org Wikipedia] uses? There are a lot of [http://home.twcny.rr.com/nerode/neroden/fdl.html reasons not to use it]; perhaps we shoud pick a more liberal [http://www.creativecommons.org Creative Commons] license instead? Even the GNU folks state:

"We believe that published software and documentation should be free software and free documentation. We recommend making all sorts of educational and reference works free also, using free documentation licenses such as the GNU Free Documentation License (GNU FDL). For other kinds of works, we recommend you consider the licenses proposed by Creative Commons." ([http://www.gnu.org/licenses/licenses.html#TOCOtherWorks source])

:If this is actually a concern, this issue needs to be raised on the forums, not here on this page. This page is for testing out wiki functionality, not for holding discussions. That is better done on either a different page, or in the wiki forum. -- Dibrom 12:58, 13 Oct 2004 (PDT)

[[MediaWiki:indexpage]]
[[MediaWiki:indexpage-url]]

blah test

{| align=center border="1" cellpadding="5" cellspacing="0" style="text-align: center"
|+'''How do i center my text'''
| A || Man || Eating || Duck
|-
| Duck || Eating || Man || A
|}

ReplayGain

2005-02-24T11:41:50Z

130.225.245.182:

#REDIRECT [[replaygain]]

Hydrogenaudio Knowledgebase:Sandbox

2005-02-20T18:36:38Z

130.225.245.182:

Please note that all contributions to [[Topic_Index|Hydrogenaudio Knowledgebase]] are considered to be released under the [http://www.gnu.org/copyleft/fdl.html GNU Free Documentation License] (see [[Hydrogenaudio Knowledgebase:Copyrights|Hydrogenaudio Knowledgebase Copyrights]] for details). If you don't want your writing to be edited mercilessly and redistributed at will, then don't submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource. DO NOT SUBMIT COPYRIGHTED WORK WITHOUT PERMISSION !

<math>\sum_{n=0}^\infty \frac{x^n}{n!}</math>

Before we get started, are we happy with the [http://www.gnu.org/copyleft/fdl.html GNU FDL] as [http://www.wikipedia.org Wikipedia] uses? There are a lot of [http://home.twcny.rr.com/nerode/neroden/fdl.html reasons not to use it]; perhaps we shoud pick a more liberal [http://www.creativecommons.org Creative Commons] license instead? Even the GNU folks state:

"We believe that published software and documentation should be free software and free documentation. We recommend making all sorts of educational and reference works free also, using free documentation licenses such as the GNU Free Documentation License (GNU FDL). For other kinds of works, we recommend you consider the licenses proposed by Creative Commons." ([http://www.gnu.org/licenses/licenses.html#TOCOtherWorks source])

:If this is actually a concern, this issue needs to be raised on the forums, not here on this page. This page is for testing out wiki functionality, not for holding discussions. That is better done on either a different page, or in the wiki forum. -- Dibrom 12:58, 13 Oct 2004 (PDT)

[[MediaWiki:indexpage]]
[[MediaWiki:indexpage-url]]

<math>n(CH_3COOH) = c cdot V = 0,0965M cdot 25,00mL = underline underline {2,413mmol} </math>

Talk:Vorbis Comment

2005-01-15T19:16:57Z

130.225.245.182:

I am looking for source-code to read the Vorbis Comment's from OGG or FLAC
files. Preferential programming languages are Delphi or C++.
It would be nice, if you could give me some informations.

Thanks

This is not for discussion. Please use the forum instead.

FAQ EAC

2004-12-17T11:10:25Z

130.225.245.182:

=EAC Configuration and Usage Guide=

EAC is the most powerful and advanced ripper available - it delivers the highest quality rips possible, and unsurprisingly is the most popular ripping software at Hydrogenaudio.

There's one catch - configuring it correctly is a newbie's nightmare. This guide will take you through all necessary steps of the configuration, so you will be able to enjoy high quality compressed audio no matter how advanced you are.

''Before you continue reading this, you should first decide which format to use for your music archive. The choice is often difficult - the [[Audio format guide]] may make it easier for you.''

To begin with, download EAC and install or unzip it to a folder of your choice. Also, you should download and install the VOB ASAPI Driver, especially if you are running Windows 2000/XP. Both programs are available at the [[download page]].

Note: This tutorial assumes you are installing EAC for the first time, i.e. that the default settings are set to start with. If this is not the case, you can reset them by doing the following:

*Press <Windows Key> + <R> (or click 'Start | Run'), type ''regedit'', and hit <Enter>.
*Go to the key ''HKEY_CURRENT_USER\Software\AWSoftware\EAC'', and delete it by pressing '''Del'''.

==EAC Configuration Wizard==

Upon running EAC for the first time, a setup wizard will appear. Close it by clicking ''Cancel'', and '''close and restart''' EAC. This is important - we have to do this to circumvent a bug in EAC which makes the program configure your reading devices (CD-ROM/DVD/CD-RW drives) incorrectly when it is first run.

After restarting, re-run the config wizard by clicking EAC -> Configuration Wizard. Keep a clean Audio CD handy, you'll need it in a minute to test and configure your drives.

Click ''Next''; EAC will now list all CD drives it found in your system (all of them should be checked). Click ''Next'' again.

You will now be asked what read mode to use for the drive. Be sure to enable ''I prefer to have accurate results'':

[[Image:Wizard_accurateresults.png|none|frame|I prefer to have accurate results]]

Click ''Next'' again. On the next page, click ''I don't trust these values, detect the features for my drive''.

[[Image:Wizard_donttrust.png|none|frame|I dont trust these values]]

Now, insert an Audio CD into your drive (if you have more than one, you will see in the window which one to use), and click ''Next'' twice. EAC will now perform some tests in order to determine your drive's capabilities, and display the results within a few minutes.

[[Image:Wizard_results.png|none|frame|Detection results]]

If this is the case, click ''Next'' again. If you have more than one drive, the same procedure must now be repated for the other drives; once all drives have been tested, a summary like this will be displayed:

[[Image:Wizard_driveranking.png|none|frame|Drive ranking]]

Don't rely on this. This is purely a feature-based ranking (mainly dependant on the ''Audio Caching'' feature which is an obstacle for secure audio extraction) - it provides no assessment of the drives' actual ripping quality (in this example, EAC is completely wrong - the NEC drive is totally unreliable for audio extraction, while the Lite-On is excellent). You will have to test this for yourself later.

Now, click ''Next'' again. EAC will now ask you whether or not you would like to configure the LAME encoder - uncheck the appropriate option, and proceed to the next page:

[[Image:Wizard_lame.png|none|frame|Uncheck 'Install and configure the external LAME.EXE compressor']]

You will now be asked for your e-mail address in order to access the freedb online music database. You needn't enter your real one, something like this will do:

[[Image:Wizard_freedb.png|none|frame|Enter e-mail address]]

Click ''Next'', and select ''I am an expert, let me use the full potential of EAC'' on the next page:

[[Image:Wizard_expert.png|none|frame|Expert mode]]

Don't worry about it if you're not an expert ;-) - this tutorial explains all important options. Also, when run in Beginner Mode, EAC resets some settings that are important to us.

Click ''Finish'' now to close the wizard.

==EAC Options==

Check out the EAC options in the EAC menu. While there isn't necessarily much you should change, it is important that you set error recovery quality to "high". Notice that the below Coaster Factory tutorials are for EAC 0.9 Prebeta9, so don't take everything as a fact.

<html><div style="border: 1px dashed #000000; height: 550px; margin: 0px auto; padding: 20px; width: 550px;"><iframe style="height: 100%; width: 100%" src="http://users.pandora.be/satcp/eac02p.htm"></iframe></div></html>

==CD-ROM Drive Options==

For perfect rips, you should setup your CD-ROM drive correctly (secure mode options, offset correction options, gap detection options). Go to the drive options in EAC menu and follow these instructions:

Drive Setup (done once):

Select: ''Secure mode with the following drive features (recommended)''

You will need to detect & apply drive features when using secure mode but only if you chose not to use the configuration wizard otherwise you can skip drive setup. Beware that these features are unique to every CD-ROM drive

===Drive Features===

; Caching/Drive caches audio
: If EAC reports "Caching: Yes" your drive caches audio data, every sector read will be read from cache and is identical, this will increase the probability of errors & cause a speed decrease. EAC needs to clear the cache by overreading it, enable this by ticking the "drive caches audio" box.

: Tip: EAC may misinform about audio caching as an alternative you can use [http://www.feurio.com/English/Download/download_install.shtml Feurio's] audio caching test found in Feurio.exe\Ctrl+Alt+P\Test device\Cache test.

: Tip: Some drives disable audio caching at low speeds, if your drive is set to DMA transfer mode try changing it to PIO only transfer mode then re-test for caching.

; Accurate Stream/Drive has ‘Accurate Stream’ feature : If EAC reports "Accurate Stream: Yes" your drive doesn't jitter this will decrease the probability of errors & cause a speed increase, enable this option by ticking the "Accurate Stream" box.

; C2 Error Info/Drive is capable of retrieving C2 error information"
: With C2 enabled EAC's error detection becomes dependent on the drives C2 accuracy which varies from drive to drive & increases the probability of errors, this feature also results in a speed increase because EAC doesn't read the data twice anymore, If your drive supports this feature & you decide to use it enable this by ticking C2 Error Info box.

: Tip: To determine your drives C2 accuracy you could attempt creating a [http://www.exactaudiocopy.org/eac13.html DAE Quality] test CD. This takes a long time though. If you are not completely sure your drive supports C2 correctly you should disable this feature in EAC.

: Tip: [http://users.pandora.be/satcp/eacoffsets01.htm#- The Coaster Factory], [http://www.offsetbase.eac-audio.de/offset-en.php Eac-Audio.de] have databases with user reported drive settings, you can use them to determine the appropriate features for your drive.

So an ideal drive would support accurate stream (tick) & wouldn't cache audio (no tick).

<html><div style="border: 1px dashed #000000; height: 550px; margin: 0px auto; padding: 20px; width: 690px;"><iframe style="height: 100%; width: 100%" src="http://users.pandora.be/satcp/eac03p.htm"></iframe></div></html>

==Freedb/Database Options==

If you are online, go to the freedb/database options in the EAC menu. Put in an email address and click "get active freedb server list..."

(still under construction...)

=Additional reading=
* EAC [[Gap settings]]
* [[EAC CUE Sheets]] ASCII formats explained

Hydrogenaudio Knowledgebase:Sandbox

2004-10-12T12:55:41Z

130.225.245.182:

Test 1234!

Hydrogenaudio Knowledgebase:Sandbox

2004-10-12T12:42:08Z

130.225.245.182:

Test 1234!
math si bork. no Latex rendering.

Hydrogenaudio Knowledgebase:Sandbox

2004-10-12T12:41:26Z

130.225.245.182:

Test 1234!
<math>a^2</math>