note 72835 added to ref.openal
| From: | Tjeerd at osu1 dot php dot net | Date: | Fri, 02 Feb 2007 16:37:29 +0000 |
| Subject: | note 72835 added to ref.openal | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-122564@lists.php.net to get a copy of this message | ||
OpenAL aims to provide a standardized API for something called '3D' sound, just like
OpenGL does for '3D' video rendering.
The fun part of OpenAL is that it does all the DSP for you, so you don't need to know a lot
about audio. Since OpenAL comes from Creative Labs, it supports hardware rendering of audio with
most if not all SoundBlaster audio controllers. They come with chips from EMU-systems and are
specifically designed to mix down multichannel audio with DSP effects like reverb and chorus, which
could consume a lot CPU speed.
The downside of OpenAL is that (at this time of writing) it is focus on games only. It doesn't
do MIDI at all, it doesn't record anything, it doesn't work like a synthesizer. The only
thing you can do with OpenAL is play sounds in a simulated 3D environment.
It probably doesn't work on the web.
To use OpenAL you need to read the documentation about OpenAL.
Note concerning audio users: there's no such thing as '3D' audio with speakers.
Technically, when people have only two ears, they really can't distinguish sound from above or
below, even in front or from behind. To achieve this people merely hear volume, the brightness of
sound and the phase difference. One should be able to hear more '3D' sound with only two
quality-class speakers than with a consumer class 5.1-set.
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Server IP: 194.109.193.76
Probable Submitter: 213.84.246.227
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Manual Page -- http://www.php.net/manual/en/ref.openal.php
Edit -- https://master.php.net/note/edit/72835
Del: integrated -- https://master.php.net/note/delete/72835/integrated
Del: useless -- https://master.php.net/note/delete/72835/useless
Del: bad code -- https://master.php.net/note/delete/72835/bad+code
Del: spam -- https://master.php.net/note/delete/72835/spam
Del: non-english -- https://master.php.net/note/delete/72835/non-english
Del: in docs -- https://master.php.net/note/delete/72835/in+docs
Del: other reasons-- https://master.php.net/note/delete/72835
Reject -- https://master.php.net/note/reject/72835
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