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1<?xml version='1.0' encoding="UTF-8"?> 1<?xml version='1.0' encoding="UTF-8"?>
2<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/alsa-guide.xml,v 1.77 2007/05/03 06:21:01 nightmorph Exp $ --> 2<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/alsa-guide.xml,v 1.78 2007/05/06 23:27:46 nightmorph Exp $ -->
3 3
4<!DOCTYPE guide SYSTEM "/dtd/guide.dtd"> 4<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
5 5
6<guide link="/doc/en/alsa-guide.xml"> 6<guide link="/doc/en/alsa-guide.xml">
7<title>Gentoo Linux ALSA Guide</title> 7<title>Gentoo Linux ALSA Guide</title>
8 8
9<author title="Author"> 9<author title="Author">
10 <mail link="fox2mike@gentoo.org">Shyam Mani</mail> 10 <mail link="fox2mike@gentoo.org">Shyam Mani</mail>
11</author> 11</author>
12<author title="Author"> 12<author title="Author">
13 <mail link="nightmorph@gentoo.org">Joshua Saddler</mail> 13 <mail link="nightmorph@gentoo.org">Joshua Saddler</mail>
14</author> 14</author>
15<author title="Contributor"> 15<author title="Contributor">
16 <mail link="flameeyes@gentoo.org">Diego Pettenò</mail> 16 <mail link="flameeyes@gentoo.org">Diego Pettenò</mail>
17</author> 17</author>
18 18
19<abstract> 19<abstract>
20This document helps a user setup ALSA on Gentoo Linux. 20This document helps a user setup ALSA on Gentoo Linux.
21</abstract> 21</abstract>
22 22
23<!-- The content of this document is licensed under the CC-BY-SA license --> 23<!-- The content of this document is licensed under the CC-BY-SA license -->
24<!-- See http://creativecommons.org/licenses/by-sa/2.5 --> 24<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
25<license/> 25<license/>
26 26
27<version>2.20</version> 27<version>2.21</version>
28<date>2007-05-02</date> 28<date>2007-05-06</date>
29 29
30<chapter> 30<chapter>
31<title>Introduction</title> 31<title>Introduction</title>
32<section> 32<section>
33<title>What is ALSA?</title> 33<title>What is ALSA?</title>
34<body> 34<body>
35 35
36<p> 36<p>
37ALSA, which stands for <e>Advanced Linux Sound Architecture</e>, provides 37ALSA, which stands for <e>Advanced Linux Sound Architecture</e>, provides
38audio and MIDI (<e>Musical Instrument Digital Interface</e>) functionality to 38audio and MIDI (<e>Musical Instrument Digital Interface</e>) functionality to
39the Linux operating system. ALSA is the default sound subsystem in the 2.6 39the Linux operating system. ALSA is the default sound subsystem in the 2.6
40kernel thereby replacing OSS (<e>Open Sound System</e>), which was used in the 40kernel thereby replacing OSS (<e>Open Sound System</e>), which was used in the
412.4 kernels. 412.4 kernels.
42</p> 42</p>
43 43
202<note> 202<note>
203For ease of use/explanation, we assume the user has a PCI based sound card for 203For ease of use/explanation, we assume the user has a PCI based sound card for
204the remainder of this guide. 204the remainder of this guide.
205</note> 205</note>
206 206
207<p> 207<p>
208We now proceed to find out details about the sound card. 208We now proceed to find out details about the sound card.
209</p> 209</p>
210 210
211<pre caption="Soundcard Details"> 211<pre caption="Soundcard Details">
212# <i>lspci -v | grep -i audio</i> 212# <i>lspci -v | grep -i audio</i>
2130000:00:0a.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 06) 2130000:00:0a.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 06)
214</pre> 214</pre>
215 215
216<p> 216<p>
217We now know that the sound card on the machine is a Sound Blaster Live! and 217We now know that the sound card on the machine is a Sound Blaster Live! and the
218the card manufacturer is Creative Labs. Head over to the 218card manufacturer is Creative Labs. Head over to the <uri
219<uri link="http://www.alsa-project.org/alsa-doc/"> ALSA Soundcard Matrix</uri> 219link="http://bugtrack.alsa-project.org/main/index.php/Matrix:Main">ALSA
220page and select Creative Labs from the drop down menu. You will be taken to 220Soundcard Matrix</uri> page and select Creative Labs from the drop down menu.
221the Creative Labs matrix page where you can see that the SB Live! uses the 221You will be taken to the Creative Labs matrix page where you can see that the SB
222<c>emu10k1</c> module. That is the information we need for now. If you are 222Live! uses the <c>emu10k1</c> module. That is the information we need for now.
223interested in detailed information, you can click on the link next to the 223If you are interested in detailed information, you can click on the link next to
224"Details" and that will take you to the <c>emu10k1</c> specific page. 224the "Details" and that will take you to the <c>emu10k1</c> specific page.
225</p> 225</p>
226 226
227<p> 227<p>
228If you intend to use MIDI, then you should add <c>midi</c> to your USE flags in 228If you intend to use MIDI, then you should add <c>midi</c> to your USE flags in
229<path>/etc/make.conf</path> before emerging any ALSA packages. Later in the 229<path>/etc/make.conf</path> before emerging any ALSA packages. Later in the
230guide, we will show you how to set up <uri link="#midi">MIDI support</uri>. 230guide, we will show you how to set up <uri link="#midi">MIDI support</uri>.
231</p> 231</p>
232 232
233</body> 233</body>
234</section> 234</section>
235<section id="kernel"> 235<section id="kernel">
236<title>Using ALSA provided by your Kernel</title> 236<title>Using ALSA provided by your Kernel</title>
237<body> 237<body>
238 238
239<p> 239<p>

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