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2024-03-28T21:28:43Z
User contributions
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Topic Index
2004-12-06T16:04:33Z
<p>67.70.164.12: /* Audio Hardware */</p>
<hr />
<div>Currently most of these links lead nowhere due to the fact that we are considering how to best convert the [http://doc.hydrogenaudio.org/wikis/hydrogenaudio/FrontPage old material] and how to reorganize things in a more efficient manner.<br />
<br />
* Please see [http://www.hydrogenaudio.org/forums/index.php?showtopic=12979&st=25&p=247441&#entry247441 this thread] for a discussion of the future structure of this wiki. If you have thoughts, comments, suggestions, etc., please join in this discussion. In the meantime, please feel free to fill in gaps in the information below.<br />
* See also [http://www.hydrogenaudio.org/forums/index.php?showtopic=28658 style related discussion]<br />
<br />
<br />
==General Information==<br />
===Guides===<br />
* [[Create_LongTerm_Archive|Create a long-term archive]]<br />
<br />
===FAQ's===<br />
*[[FAQ General Audio Compression|General Audio Compression]]<br />
*[[FAQ Lossy Formats|Lossy Formats]] (MP3, WMA, AAC etc.)<br />
*[[FAQ EAC|EAC]]<br />
*[[FAQ Secure Mode Ripping|Secure Mode Ripping]]<br />
*[[FAQ Offsets|Offsets]]<br />
*[[FAQ Protected Audio CD|Protected Audio CD]]s<br />
*[[FAQ Various|Various]] (SACD, DVD-A, Vinyl, Cassette etc.)<br />
<br />
===Glossary===<br />
<br />
* [[Glossary_Of_Audio_Terms|Glossary of Audio Terms]]<br />
<br />
==Specific Information==<br />
<br />
===Audio Software===<br />
----<br />
<br />
''Note: We need to figure out a good way to denote the distinction between software available on different platforms.''<br />
''Why not add supported platforms after the name of the tool?''<br />
<br />
====Encoders/Decoders====<br />
<br />
=====Lossless=====<br />
<br />
* [[TTA]] (True Audio) (Win32/Posix)<br />
<br />
* [[FLAC]] (Win32/Posix)<br />
<br />
* [[LA_Encoder|LA]]<br />
<br />
* [[Monkey's Audio]]<br />
<br />
* [[OptimFROG]]<br />
<br />
* [[WavPack]] (Dos/Win32/Posix)<br />
<br />
=====Lossy=====<br />
<br />
* [[FAAC]] ([[AAC]]) (Win32/Posix/MacOSX)<br />
<br />
* [[LAME]] ([[MP3]]) (Win32/Posix)<br />
<br />
* [[mppenc]] ([[Musepack|Musepack]])<br />
<br />
* [[oggenc]] ([[Ogg_Vorbis]]) (Win32/Posix)<br />
<br />
====Rippers====<br />
<br />
* [[Exact_Audio_Copy|Exact Audio Copy]] (EAC)<br />
* [[iTunes]] (Win32/OsX)<br />
* [[cdparanoia]] (Posix)<br />
<br />
====Players====<br />
<br />
===== Windows =====<br />
<br />
* [[foobar2000]]<br />
<br />
* [[Winamp]]<br />
<br />
* [[iTunes]]<br />
<br />
* [[wxMusik]]<br />
<br />
* [[Quintessential Player]]<br />
<br />
=====Linux/BSD=====<br />
<br />
* [[Rhythmbox]]<br />
<br />
* [[Muine]]<br />
<br />
* [[Amarok]]<br />
<br />
* [[XMMS]]<br />
<br />
* [[wxMusik]]<br />
<br />
* [[Beep Media Player]] (BMP)<br />
<br />
=====Mac OS X (Non-BSD Specific) =====<br />
<br />
* [[iTunes]]<br />
<br />
* [[Whamb]]<br />
<br />
=====Other=====<br />
<br />
* [[CL-Amp]] (BeOS)<br />
<br />
====Editors====<br />
<br />
* [[Adobe_Audition|Adobe Audition]] (Previously known as CoolEdit)<br />
* [[Audacity]]<br />
<br />
====Testing Software====<br />
<br />
=====Subjective Perceptual=====<br />
<br />
* [[ABC/HR]]<br />
<br />
* [[PCABX]]<br />
<br />
=====Objective=====<br />
<br />
''Note: Might be good to put something here about the problems of quality comparisons using graphs, frequency sweeps, etc.''<br />
<br />
* [[EAQUAL]]<br />
<br />
* [[Rightmark_Audio_Analyzer|Rightmark Audio Analyzer]]<br />
<br />
===Audio Hardware===<br />
----<br />
<br />
====PC Audio====<br />
<br />
====HiFi====<br />
<br />
====Digital Audio Players====<br />
<br />
'''Portable Flash'''<br />
<br />
''(These players make use of a internal flash drive.)''<br />
<br />
* [[Creative MuVo]]<br />
<br />
* [[iRiver iFP Series]]<br />
<br />
* [[Rio Carbon]]<br />
<br />
* [[Neuros]]<br />
<br />
'''Portable HD'''<br />
<br />
''(These players make use of a internal harddrive.)''<br />
<br />
* [[Apple iPod]]<br />
<br />
* [[iRiver H-Series]]<br />
<br />
* [[Rio Karma]]<br />
<br />
* [[iAudio M3]]<br />
<br />
* [[Neuros]]<br />
<br />
'''Portable CD'''<br />
<br />
'''Car Players'''<br />
<br />
''(Car stereos that can read MP3, Vorbis, WMA, etc.).''<br />
<br />
* [[Aiwa CDC-MP3]]<br />
<br />
===Audio Theory===<br />
----<br />
<br />
====Analog Audio====<br />
<br />
====Digital Audio====<br />
<br />
====Compression Technology====<br />
<br />
'''Lossy'''<br />
*[[MP3]]<br />
<br />
*[[AAC]]<br />
<br />
*[[Ogg Vorbis]]<br />
<br />
*[[Musepack]]<br />
<br />
*[[WMA]]<br />
<br />
*[[ATRAC3]]<br />
<br />
'''Lossless'''<br />
<br />
*[[Apple Lossless]]<br />
<br />
*[[TTA]]<br />
<br />
*[[FLAC]]<br />
<br />
*[[LA]]<br />
<br />
*[[Monkey's Audio]]<br />
<br />
*[[OptimFROG]]<br />
<br />
*[[WavPack]]<br />
<br />
*[[Shorten]]<br />
<br />
====Testing Methodology====<br />
<br />
===Audio Development===<br />
----<br />
<br />
====Getting Started====<br />
<br />
====Tools====<br />
<br />
====Resources====<br />
<br />
===Audio Resources===<br />
----<br />
<br />
====Websites====<br />
<br />
''Note: Let's include a small description to the side for now, so that we have something to work with when this section becomes large enough for it's own page''<br />
<br />
* http://www.audiocoding.com (Page with a wiki on technical audio topics, homepage of FAAC and FAAD2, also has an AAC forum.)<br />
* http://www.ff123.net (Lots of general information on various MP3 implementations, test samples, testing methodology information, homepage of ABC/HR)<br />
* http://www.head-fi.org (general information/board about head phones and portable audio players)<br />
* http://www.rarewares.org (Downloads for many audio and media tools)<br />
<br />
====Articles====<br />
<br />
====Listening Tests====<br />
<br />
===Other Topics===<br />
----<br />
<br />
====Video====<br />
<br />
* [[MPEG-4 Visual]]<br />
* [[Theora]]<br />
* [[Real Video]]<br />
* [[Windows Media Video]]<br />
* [[VP6]]<br />
<br />
====[[Container Formats]]====<br />
* [[Matroska]]<br />
* [[Ogg]]<br />
* [[AVI]]<br />
* [[MPEG-4 Systems]]<br />
<br />
====[[Metadata]]====<br />
* [[ID3]]<br />
* [[APE Tags]]<br />
* [[Vorbis Comment]]</div>
67.70.164.12
https://wiki.hydrogenaud.io/index.php?title=Neuros
Neuros
2004-12-06T16:03:30Z
<p>67.70.164.12: </p>
<hr />
<div>[http://www.neurosaudio.com Neuros Audio]<br />
<br />
{{stub}}</div>
67.70.164.12
https://wiki.hydrogenaud.io/index.php?title=Vorbis
Vorbis
2004-12-06T16:00:36Z
<p>67.70.164.12: /* Hardware */</p>
<hr />
<div>=Introduction=<br />
Ogg Vorbis (http://www.vorbis.com) is a fully open, non-proprietary, patent-free <small>(subject to [http://www.hydrogenaudio.org/show.php/showtopic/13531 speculation])</small>, and royalty-free, general-purpose compressed audio format for mid to high quality (8khz-48.0kHz, 16+ bit, polyphonic) audio and music at fixed and variable bitrates from 16 to >256 kbps/channel. This places vorbis in the same competitive class as audio representations such as mpeg-4 ([[AAC]]), and similar to, but higher performance [[MP3]], twinvq ([[VQF]]), [[WMA]] and [[PAC]].<br />
<br />
Vorbis is the first of a planned family of Ogg multimedia coding formats being developed as part of xiphophorus's ogg multimedia project.<br />
<br />
Informal listening test suggest Vorbis to be comparable to mpeg-4 [[AAC]] at most bitrates and [[MPC]] at 128kbs. Transparency is generally reached at about 150-170kbps (with some exceptions). The encoder is reasonably young and unoptimized, so further improvements can be expected.<br />
<br />
Unfortunately, Xiph.org has failed to improve Vorbis at a steady rate since its initial 1.0 release in July 2002. Since then development has been lead by other coders such as Garf and Aoyumi, who have improved the quality particularly at high bitrates. Aoyumi's AoTuV series of encoders was incorporated into the August 2004 (??) release of 1.1, which bought about the first quality improvements across the board for 2 years.<br />
<br />
<br />
==Pros==<br />
* Free (as in speech), Open Source and claimed to be patent free<br />
* Good all-round performance (>48kbs - a leading codec at 128kbs)<br />
* Well written [http://www.xiph.org/ogg/vorbis/docs.html specs]<br />
* Several portable hardware players<br />
* Suitable for internet-streaming (via Icecast)<br />
* Fully gapless playback<br />
<br />
==Cons==<br />
* Limited official development<br />
* Current implementations are more computationally intensive to encode and decode than MP3<br />
* Quality at high bitrates could benefit from further tuning<br />
<br />
=Features of compression=<br />
* Advanced psymodel<br />
* Coupled stereo modes ([[lossy]] and [[lossless]])<br />
* [[Huffman coding]]<br />
* Vector quantization<br />
* Modified discrete cosine transform ([[MDCT]])<br />
* Multiple block sizes for block switching<br />
<br />
<br />
=Software=<br />
'''Encoders'''<br />
<br />
* [[oggenc]]<br />
<br />
'''Decoders'''<br />
<br />
* [http://qtcomponents.sourceforge.net/ QuickTime Component] (Allows playback in [[QuickTime]]/[[iTunes]])<br />
* [http://corevorbis.corecodec.org/ CoreVorbis] (DirectShow)<br />
<br />
=Hardware=<br />
The following player support playback of Ogg Vorbis.<br />
* [[iRiver H-Series]]<br />
* [[Rio Karma]]<br />
* [[IAudio M3]]<br />
* [[Neuros]]<br />
<br />
=Additional reading=<br />
* [[Ogg]] (Container)<br />
* [http://www.audiocoding.com/modules/wiki/?page=Ogg+Vorbis Ogg Vorbis at AudioCoding]<br />
* [http://www.hydrogenaudio.org/show.php/showtopic/13531 Discussion of Vorbis' legal status]<br />
* [http://www.xiph.org Xiph.org Foundation]</div>
67.70.164.12