| 1 | <?xml version='1.0' encoding="UTF-8"?> |
1 | <?xml version='1.0' encoding="UTF-8"?> |
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2 | <!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/alsa-guide.xml,v 1.19 2003/11/15 11:07:58 neysx Exp $ --> |
| 2 | <!DOCTYPE guide SYSTEM "/dtd/guide.dtd"> |
3 | <!DOCTYPE guide SYSTEM "/dtd/guide.dtd"> |
| 3 | |
4 | |
| 4 | <guide link = "/doc/en/alsa-guide.xml"> |
5 | <guide link = "/doc/en/alsa-guide.xml"> |
| 5 | <title>Gentoo Linux ALSA Guide</title> |
6 | <title>Gentoo Linux ALSA Guide</title> |
| 6 | <author title="Author"><mail link="zu@pandora.be"> |
7 | <author title="Author"><mail link="zu@pandora.be"> |
| 7 | Vincent Verleye</mail> |
8 | Vincent Verleye</mail> |
| 8 | </author> |
9 | </author> |
| 9 | |
10 | <author title="Author"><mail link="g2boojum@gentoo.org"> |
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11 | Grant Goodyear</mail> |
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12 | </author> |
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13 | <author title="Author"><mail link="agenkin@gentoo.org"> |
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14 | Arcady Genkin</mail> |
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15 | </author> |
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16 | <author title="Editor"><!-- zhen@gentoo.org --> |
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17 | John P. Davis |
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18 | </author> |
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19 | <author title="Editor"><mail link="swift@gentoo.org"> |
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20 | Sven Vermeulen</mail> |
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21 | </author> |
| 10 | <author title="Editor"><mail link="zhen@gentoo.org"> |
22 | <author title="Editor"><mail link="bennyc@gentoo.org"> |
| 11 | John P. Davis</mail> |
23 | Benny Chuang</mail> |
| 12 | </author> |
24 | </author> |
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25 | <author title="Editor"><mail link="blubber@gentoo.org"> |
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26 | Tiemo Kieft</mail> |
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27 | </author> |
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28 | |
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29 | <license/> |
| 13 | |
30 | |
| 14 | <abstract> |
31 | <abstract> |
| 15 | This guide will show you how to set up the Advanced Linux Sound Architecture (ALSA) on Gentoo Linux. |
32 | This guide will show you how to set up the Advanced Linux Sound Architecture (ALSA) on Gentoo Linux. |
| 16 | In addition to the Gentoo Linux Desktop Configuration Guide, this guide is supposed to give you more information on this subject. </abstract> |
33 | In addition to the Gentoo Linux Desktop Configuration Guide, this guide is supposed to give you more information on this subject. </abstract> |
| 17 | |
34 | |
| 18 | <version>1.2</version> |
35 | <version>1.3.3</version> |
| 19 | <date>09 February 2003</date> |
36 | <date>October 9, 2003</date> |
| 20 | |
37 | |
| 21 | <chapter> |
38 | <chapter> |
| 22 | <title>Introduction</title> |
39 | <title>Introduction</title> |
| 23 | <section> |
40 | <section> |
| 24 | <title>What is ALSA?</title> |
41 | <title>What is ALSA?</title> |
| … | |
… | |
| 77 | </chapter> |
94 | </chapter> |
| 78 | |
95 | |
| 79 | <chapter> |
96 | <chapter> |
| 80 | <title>Installation</title> |
97 | <title>Installation</title> |
| 81 | <section> |
98 | <section> |
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99 | <title>Gentoo USE flags</title> |
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100 | <body> |
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101 | |
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102 | <p> |
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103 | To compile programs with ALSA-support, be sure to add <e>alsa</e> to |
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104 | your USE-variable. However, several tools don't support alsa yet, and |
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105 | require OSS. ALSA provides OSS-emulation if you define <e>oss</e> in your |
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106 | USE-variable before you start. |
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107 | </p> |
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108 | |
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109 | </body> |
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110 | </section> |
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111 | |
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112 | <section> |
| 82 | <title>Kernel modules</title> |
113 | <title>Kernel modules</title> |
| 83 | <body> |
114 | <body> |
| 84 | <p> |
115 | <p> |
| 85 | Since we're still using 2.4.x kernel sources, we'll have to compile kernel modules and ALSA modules separately. |
116 | Since we're still using 2.4.x kernel sources, we'll have to compile kernel modules and ALSA modules separately. People who are using a 2.5.x kernel can do this from within their kernel configuration, since the ALSA modules are included in the kernel sources and should be built there. |
| 86 | </p> |
117 | </p> |
| 87 | <p> |
118 | <p> |
| 88 | First we'll make sure that our kernel configuration is ready for use with ALSA. |
119 | First we'll make sure that our kernel configuration is ready for use with ALSA. |
| 89 | All you need in your kernel configuration is having Sound Card Support set to be built as a module (M). |
120 | All you need in your kernel configuration is having Sound Card Support set to be built as a module (M). |
| 90 | This will build <c>soundcore.o</c>. |
121 | This will build <c>soundcore.o</c>. |
| … | |
… | |
| 97 | </p> |
128 | </p> |
| 98 | <p>If you already have a working kernel configuration, make sure you remove all sound drivers (except for Sound Card Support). |
129 | <p>If you already have a working kernel configuration, make sure you remove all sound drivers (except for Sound Card Support). |
| 99 | If you wish to do this without having to reboot, you could do like this: |
130 | If you wish to do this without having to reboot, you could do like this: |
| 100 | </p> |
131 | </p> |
| 101 | <pre> |
132 | <pre> |
| 102 | # <c>cd /usr/src/linux</c> |
133 | # <i>cd /usr/src/linux</i> |
| 103 | # <c>cp .config ~/</c> |
134 | # <i>cp .config ~/</i> |
| 104 | # <c>make mrproper</c> |
135 | # <i>make mrproper</i> |
| 105 | # <c>cp ~/.config .</c> |
136 | # <i>cp ~/.config .</i> |
| 106 | # <c>make menuconfig</c> |
137 | # <i>make menuconfig</i> |
| 107 | </pre> |
138 | </pre> |
| 108 | <p> |
139 | <p> |
| 109 | Now select <e>Sound Card Support</e> as Module (M) and deselect all other sound drivers. |
140 | Now select <e>Sound Card Support</e> as Module (M) and deselect all other sound drivers. |
| 110 | Exit and say Y to save your kernel configuration. |
141 | Exit and say Y to save your kernel configuration. |
| 111 | After that, build the modules: |
142 | After that, build the modules: |
| 112 | </p> |
143 | </p> |
| 113 | <pre> |
144 | <pre> |
| 114 | # <c>make dep clean</c> |
145 | # <i>make dep clean</i> |
| 115 | # <c>make modules modules_install</c> |
146 | # <i>make modules modules_install</i> |
| 116 | </pre> |
147 | </pre> |
| 117 | <p> |
148 | <p> |
| 118 | Before installing your new modules, this last line will delete all your previous modules, |
149 | Before installing your new modules, this last line will delete all your previous modules, |
| 119 | even the ones from a previous ALSA installation. |
150 | even the ones from a previous ALSA installation. |
| 120 | </p> |
151 | </p> |
| 121 | <p> |
152 | <p> |
| 122 | <impo> |
153 | <impo> |
| 123 | This means, whenever you recompile your kernel later on, you MUST recompile <c>alsa-driver</c>. |
154 | This means, whenever you recompile your kernel later on, you MUST recompile <c>alsa-driver</c>. |
| 124 | </impo> |
155 | </impo> |
| 125 | </p> |
156 | </p> |
| 126 | <p> |
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| 127 | <note>However, there's no need to reinstall <c>nvidia-kernel</c>, the Nvidia drivers are in a separate directory |
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| 128 | in <path>/lib/modules/*/video</path> and won't get deleted by a <c>make modules modules_install</c> |
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| 129 | </note> |
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| 130 | </p> |
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| 131 | </body> |
157 | </body> |
| 132 | </section> |
158 | </section> |
| 133 | |
159 | |
| 134 | <section> |
160 | <section> |
| 135 | <title>ALSA modules</title> |
161 | <title>ALSA modules</title> |
| 136 | <body> |
162 | <body> |
| 137 | |
163 | |
| 138 | <p> |
164 | <p> |
| 139 | Now it's time to install the ALSA drivers for your soundcard(s). If your soundcard is PCI, you can find out the name |
165 | Now it's time to install the ALSA drivers for your soundcard(s). If your soundcard is PCI, you can find out the name |
| 140 | and type of your soundcard by looking at the output of /proc/pci |
166 | and type of your soundcard by looking at the output of /proc/pci. |
| 141 | <pre>#<c>grep audio /proc/pci</c></pre> |
167 | </p> |
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168 | <pre> |
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169 | # <i>grep audio /proc/pci</i> |
| 142 | </p> |
170 | </pre> |
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171 | |
| 143 | |
172 | |
| 144 | <p> |
173 | <p> |
| 145 | <warn> |
174 | <warn> |
| 146 | If you had a previous sound setup and there are still non-ALSA sound modules loaded, unload them <e>now</e>. |
175 | If you had a previous sound setup and there are still non-ALSA sound modules loaded, unload them <e>now</e>. |
| 147 | Check with <c>lsmod</c> and use <c>rmmod</c> to unload all sound-related modules on your system. |
176 | Check with <c>lsmod</c> and use <c>rmmod</c> to unload all sound-related modules on your system. |
| … | |
… | |
| 151 | <p> |
180 | <p> |
| 152 | We could simply do an <c>emerge alsa-driver</c> now, this would compile and install <e>all</e> ALSA sound drivers. |
181 | We could simply do an <c>emerge alsa-driver</c> now, this would compile and install <e>all</e> ALSA sound drivers. |
| 153 | </p> |
182 | </p> |
| 154 | <p> |
183 | <p> |
| 155 | However, to save some time, lookup the <e>Module Name</e> of your soundcard(s) on the |
184 | However, to save some time, lookup the <e>Module Name</e> of your soundcard(s) on the |
| 156 | <uri link="http://www.alsa-project.org/alsa-doc">ALSA Soundcard Matrix</uri> under the <e>Install</e> section. |
185 | <uri link="http://www.alsa-project.org/alsa-doc">ALSA Soundcard Matrix</uri> by following the <e>Details</e> link in the <e>Driver and Docs</e> column in the row of the chipset of your soundcard. |
| 157 | Mine is <c>EMU10K1</c>, since I have an SBlive! soundcard. |
186 | Mine is <c>snd-emu10k1</c>, since I have an SBlive! soundcard, with the <e>EMU10K1</e> chipset. |
| 158 | We'll set ALSA_CARDS environment to this value before emerging, so emerge will only compile the drivers we need. |
187 | We'll set ALSA_CARDS environment to the value of the module name before emerging (but without the snd prefix), so emerge will only compile the drivers we need. |
| 159 | </p> |
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| 160 | |
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| 161 | <p> |
188 | </p> |
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189 | |
| 162 | <pre> |
190 | <pre> |
| 163 | # <c>env ALSA_CARDS='emu10k1' emerge alsa-driver</c> |
191 | # <i>env ALSA_CARDS='emu10k1' emerge alsa-driver</i> |
| 164 | </pre> |
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| 165 | </p> |
192 | </pre> |
| 166 | <p> |
193 | <note> |
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194 | You can also add this value in <path>/etc/make.conf</path>, so when you have to emerge the alsa-driver later on you can just run <c>emerge alsa-driver</c>. |
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195 | For example, like this: <c>echo 'ALSA_CARDS="emu10k1"' >> /etc/make.conf</c> |
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196 | </note> |
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197 | |
| 167 | <note> |
198 | <note> |
| 168 | When you want to install ALSA drivers for more than one soundcard, you could set ALSA_CARDS to a space-separated list |
199 | When you want to install ALSA drivers for more than one soundcard, you could set ALSA_CARDS to a space-separated list |
| 169 | of drivers; like this: <c>env ALSA_CARDS='emu10k1 intel8x0 ens1370' emerge alsa-driver</c> |
200 | of drivers; like this: <c>env ALSA_CARDS='emu10k1 intel8x0 ens1370' emerge alsa-driver</c> |
| 170 | </note> |
201 | </note> |
| 171 | |
202 | |
| 172 | <note>If you want to have OSS compatibility, make sure to emerge <i>alsa-oss</i>, it is the ALSA/OSS compatibility |
203 | <note>If you want to have OSS compatibility, make sure to emerge <i>alsa-oss</i>, it is the ALSA/OSS compatibility |
| 173 | wrapper. </note> |
204 | wrapper. </note> |
| 174 | |
205 | |
| 175 | </p> |
206 | <note>If you plan on recompiling your kernels numerous times, it might |
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207 | be adviseable to emerge <c>alsa-driver</c> with <c>--buildpkg</c>. This |
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208 | will create a binary package for it. Later, after recompiling your kernel, |
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209 | you can just do <c>emerge --usepkg alsa-driver</c> which will install the |
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210 | binary package instead of recompiling it completely.</note> |
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211 | |
| 176 | <p> |
212 | <p> |
| 177 | After this, the ALSA modules should be installed on your system. |
213 | After this, the ALSA modules should be installed on your system. |
| 178 | </p> |
214 | </p> |
| 179 | </body> |
215 | </body> |
| 180 | </section> |
216 | </section> |
| … | |
… | |
| 183 | <body> |
219 | <body> |
| 184 | <p> |
220 | <p> |
| 185 | Let's start configuring now to get ALSA working properly. |
221 | Let's start configuring now to get ALSA working properly. |
| 186 | We'll need to edit some files, to let our system know about the freshly installed ALSA modules. |
222 | We'll need to edit some files, to let our system know about the freshly installed ALSA modules. |
| 187 | </p> |
223 | </p> |
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224 | |
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225 | <p> |
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226 | First, install <c>alsa-utils</c> on your system: |
| 188 | <p> |
227 | </p> |
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228 | |
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229 | <pre caption = "Emerging alsa-utils"> |
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230 | # <i>emerge alsa-utils</i> |
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231 | </pre> |
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232 | |
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233 | <p> |
| 189 | First file to edit is <path>/etc/modules.d/alsa</path>. |
234 | Hereafter, we need to edit <path>/etc/modules.d/alsa</path>. |
| 190 | </p> |
235 | </p> |
| 191 | <warn> |
236 | <warn> |
| 192 | There is no need to edit <path>/etc/modules.conf</path>. Instead, always edit files in <path>/etc/modules.d</path>. |
237 | There is no need to edit <path>/etc/modules.conf</path>. Instead, always edit files in <path>/etc/modules.d</path>. |
| 193 | </warn> |
238 | </warn> |
| 194 | <p> |
239 | <p> |
| 195 | Check the ALSA portion <e>at the bottom of the file</e>. |
240 | Check the ALSA portion <e>at the bottom of the file</e>. |
| 196 | By tweaking this line you can specify the max number of soundcards you have (generally, just one). |
241 | By tweaking this line you can specify the max number of soundcards you have (generally, just one). |
| 197 | </p> |
242 | </p> |
| 198 | <p> |
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| 199 | <pre caption="At the top of /etc/modules.d/alsa"> |
243 | <pre caption="At the bottom of /etc/modules.d/alsa"> |
| 200 | # Alsa 0.9.X kernel modules' configuration file. |
244 | <comment>Set this to the correct number of cards.</comment> |
| 201 | # $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/alsa-guide.xml,v 1.7 2003/02/09 23:27:14 zhen Exp $ |
245 | options snd cards_limit=1 |
| 202 | |
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| 203 | # ALSA portion |
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| 204 | alias char-major-116 snd |
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| 205 | <c>options snd major=116 cards_limit=1</c> |
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| 206 | # OSS/Free portion |
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| 207 | alias char-major-14 soundcore |
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| 208 | |
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| 209 | ## |
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| 210 | ## IMPORTANT: |
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| 211 | </pre> |
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| 212 | </p> |
246 | </pre> |
| 213 | <p> |
247 | <p> |
| 214 | Now we'll specify the sounddriver(s) ALSA should use. In the same file, edit like this: |
248 | Now we'll specify the sounddriver(s) ALSA should use. In the same file, edit like this: |
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249 | </p> |
| 215 | <pre caption="A bit lower in /etc/modules.d/alsa"> |
250 | <pre caption="In /etc/modules.d/alsa"> |
| 216 | ## and then run `update-modules' command. |
251 | ## and then run `modules-update' command. |
| 217 | ## Read alsa-driver's INSTALL file in /usr/share/doc for more info. |
252 | ## Read alsa-driver's INSTALL file in /usr/share/doc for more info. |
| 218 | ## |
253 | ## |
| 219 | ## ALSA portion |
254 | ## ALSA portion |
| 220 | <c>alias snd-card-0 snd-emu10k1</c> |
255 | alias snd-card-0 snd-emu10k1 |
| 221 | <c>## If you have more than one, add: |
256 | <comment>## If you have more than one, add:</comment> |
| 222 | ## alias snd-card-1 snd-intel8x0 |
257 | ## alias snd-card-1 snd-intel8x0 |
| 223 | ## alias snd-card-2 snd-ens1370</c> |
258 | ## alias snd-card-2 snd-ens1370 |
| 224 | ## OSS/Free portion |
259 | ## OSS/Free portion |
| 225 | ## alias sound-slot-0 snd-card-0 |
260 | ## alias sound-slot-0 snd-card-0 |
| 226 | ## alias sound-slot-1 snd-card-1 |
261 | ## alias sound-slot-1 snd-card-1 |
| 227 | ## |
262 | ## |
| 228 | </pre> |
263 | </pre> |
| 229 | </p> |
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| 230 | <p> |
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| 231 | <note> |
264 | <note> |
| 232 | If you have more than one soundcard, adjust the <c>cards_limit</c> value and add more snd-card aliases to the file. |
265 | If you have more than one soundcard, adjust the <c>cards_limit</c> value and add more snd-card aliases to the file. |
| 233 | I don't have experience with this, but you can find examples for configurations with two or more soundcards in |
266 | I don't have experience with this, but you can find examples for configurations with two or more soundcards in |
| 234 | <uri link="http://www.alsa-project.org/alsa-doc/alsa-howto/c1660.htm">Chapter 6</uri> |
267 | <uri link="http://www.alsa-project.org/alsa-doc/alsa-howto/c1660.htm">Chapter 6</uri> |
| 235 | of the <uri link="http://www.alsa-project.org/alsa-doc/alsa-howto/alsa-howto.html">ALSA Howto</uri>. |
268 | of the <uri link="http://www.alsa-project.org/alsa-doc/alsa-howto/alsa-howto.html">ALSA Howto</uri>. |
| 236 | </note> |
269 | </note> |
| 237 | </p> |
270 | <p> |
| 238 | <p> |
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| 239 | Last thing to do in this file, at the very bottom, check if these lines are there and uncommented: |
271 | Last thing to do in this file, almost at the end, check if these lines are there and uncommented: |
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272 | </p> |
| 240 | <pre caption="at the very bottom of /etc/modules.d/alsa"> |
273 | <pre caption="Near the end of /etc/modules.d/alsa"> |
| 241 | alias /dev/mixer snd-mixer-oss |
274 | alias /dev/mixer snd-mixer-oss |
| 242 | alias /dev/dsp snd-pcm-oss |
275 | alias /dev/dsp snd-pcm-oss |
| 243 | alias /dev/midi snd-seq-oss |
276 | alias /dev/midi snd-seq-oss |
| 244 | </pre> |
277 | </pre> |
| 245 | </p> |
278 | <p> |
| 246 | <p> |
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| 247 | Now double-check the file <path>/etc/modules.d/alsa</path> and when you're sure everyting is ok, run <c>update-modules</c>. |
279 | Now double-check the file <path>/etc/modules.d/alsa</path> and when you're sure everyting is ok, run <c>modules-update</c>. |
| 248 | <pre> |
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| 249 | # <c>update-modules</c> |
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| 250 | </pre> |
280 | <pre> |
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281 | # <i>modules-update</i> |
| 251 | </p> |
282 | </pre> |
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283 | </p> |
| 252 | <note> |
284 | <note> |
| 253 | Running <c>update-modules</c> here will insert the data from <path>/etc/modules.d/alsa</path> into <path>/etc/modules.conf</path> |
285 | Running <c>modules-update</c> here will insert the data from <path>/etc/modules.d/alsa</path> into <path>/etc/modules.conf</path> |
| 254 | </note> |
286 | </note> |
| 255 | <p> |
287 | <p> |
| 256 | You should also verify that /etc/devfsd.conf has the alsa devices and permissions correctly registered. |
288 | You should also verify that /etc/devfsd.conf has the alsa devices and permissions correctly registered. |
| 257 | </p> |
289 | </p> |
| 258 | <pre> |
290 | <pre caption="/etc/devfsd.conf"> |
| 259 | # nano -w /etc/devfsd.conf |
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| 260 | </pre> |
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| 261 | <pre> |
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| 262 | # ALSA/OSS stuff |
291 | # ALSA/OSS stuff |
| 263 | # Comment/change these if you want to change the permissions on |
292 | # Comment/change these if you want to change the permissions on |
| 264 | # the audio devices |
293 | # the audio devices |
| 265 | LOOKUP snd MODLOAD ACTION snd |
294 | LOOKUP snd MODLOAD ACTION snd |
| 266 | LOOKUP dsp MODLOAD |
295 | LOOKUP dsp MODLOAD |
| … | |
… | |
| 281 | <title>Adding alsasound to a runlevel</title> |
310 | <title>Adding alsasound to a runlevel</title> |
| 282 | <body> |
311 | <body> |
| 283 | <p> |
312 | <p> |
| 284 | First thing to do now, is to make ALSA startup at boottime. Like this: |
313 | First thing to do now, is to make ALSA startup at boottime. Like this: |
| 285 | <pre> |
314 | <pre> |
| 286 | # <c>rc-update add alsasound boot</c> |
315 | # <i>rc-update add alsasound boot</i> |
| 287 | </pre> |
316 | </pre> |
| 288 | </p> |
317 | </p> |
| 289 | <p> |
318 | <p> |
| 290 | <warn>Note that the alsasound script should be added to the "boot" runlevel, not the "default" runlevel.</warn> |
319 | <warn>Note that the alsasound script should be added to the "boot" runlevel, not the "default" runlevel.</warn> |
| 291 | </p> |
320 | </p> |
| … | |
… | |
| 296 | <body> |
325 | <body> |
| 297 | <p> |
326 | <p> |
| 298 | Since we're Linux users, we don't want to reboot. So we'll start the alsasound script manually. |
327 | Since we're Linux users, we don't want to reboot. So we'll start the alsasound script manually. |
| 299 | </p> |
328 | </p> |
| 300 | <pre> |
329 | <pre> |
| 301 | # <c>/etc/init.d/alsasound start</c> |
330 | # <i>/etc/init.d/alsasound start</i> |
| 302 | </pre> |
331 | </pre> |
| 303 | <p> |
332 | <p> |
| 304 | ALSA is running now. If everything is ok, you should be able to see the ALSA modules loaded when running <c>lsmod</c>. |
333 | ALSA is running now. If everything is ok, you should be able to see the ALSA modules loaded when running <c>lsmod</c>. |
| 305 | However, sound won't work yet, because the channels are still muted. We need <c>alsa-utils</c> for this. |
334 | However, sound won't work yet, because the channels are still muted. We need <c>amixer</c> for this. |
| 306 | </p> |
335 | </p> |
| 307 | <pre> |
336 | <pre caption = "Running amixer"> |
| 308 | # <c>emerge alsa-utils</c> |
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| 309 | # <c>amixer</c> |
337 | # <i>amixer</i> |
| 310 | </pre> |
338 | </pre> |
| 311 | <p> |
339 | <p> |
| 312 | <warn> |
340 | <warn> |
| 313 | You shouldn't get this, but <e>if</e> you get an error about "amixer: Mixer attach default error: No such file or directory", you should manually insmod |
341 | You shouldn't get this, but <e>if</e> you get an error about "amixer: Mixer attach default error: No such file or directory", you should manually modprobe |
| 314 | <c>snd-mixer-oss</c> and <c>snd-pcm-oss</c> once. After that run amixer again. |
342 | <c>snd-mixer-oss</c> and <c>snd-pcm-oss</c> once. After that run amixer again. |
| 315 | </warn> |
343 | </warn> |
| 316 | </p> |
344 | </p> |
| 317 | <pre caption="only if you get an error when running amixer"> |
345 | <pre caption="only if you get an error when running amixer"> |
| 318 | # <c>insmod snd-mixer-oss</c> |
346 | # <i>modprobe snd-mixer-oss</i> |
| 319 | # <c>insmod snd-pcm-oss</c> |
347 | # <i>modprobe snd-pcm-oss</i> |
| 320 | # <c>amixer</c> |
348 | # <i>amixer</i> |
| 321 | </pre> |
|
|
| 322 | <p> |
|
|
| 323 | If you got this far, now unmute both Master and PCM channels. |
|
|
| 324 | </p> |
|
|
| 325 | <p> |
|
|
| 326 | <pre> |
349 | </pre> |
|
|
350 | <p> |
|
|
351 | If you got this far, now unmute Master and PCM channels. Some hardware |
|
|
352 | even requires you to unmute the center channel or even the surround |
|
|
353 | channel. |
|
|
354 | </p> |
|
|
355 | <p> |
|
|
356 | <pre caption = "Unmuting channels"> |
| 327 | # <c>amixer set Master 100 unmute</c> |
357 | # <i>amixer set Master 100 unmute</i> |
| 328 | # <c>amixer set PCM 100 unmute</c> |
358 | # <i>amixer set PCM 100 unmute</i> |
|
|
359 | <comment>Only if the above doesn't succeed on its own:</comment> |
|
|
360 | # <i>amixer set Center 100 unmute</i> |
|
|
361 | # <i>amixer set Surround 100 unmute</i> |
|
|
362 | <comment>Test the sound:</comment> |
| 329 | # <c>aplay /usr/kde/3/share/sounds/pop.wav</c> <codenote>(pop.wav is part of KDE)</codenote> |
363 | # <i>aplay $KDEDIR/share/sounds/pop.wav</i> <codenote>(pop.wav is part of KDE)</codenote> |
| 330 | </pre> |
364 | </pre> |
| 331 | </p> |
365 | </p> |
| 332 | We check to see if sound is working by using the aplay (alsa play) command. If you hear a pop, then sound is indeed working. |
366 | We check to see if sound is working by using the aplay (alsa play) command. If you hear a pop, then sound is indeed working. |
| 333 | Then, adjust the volume settings to your liking; the ncurses-based <c>alsamixer</c> is a great way to get them "just so". |
367 | Then, adjust the volume settings to your liking; the ncurses-based <c>alsamixer</c> is a great way to get them "just so". |
| 334 | <p> |
368 | <p> |
| … | |
… | |
| 346 | <p>When you ever rebuild your kernel, or upgrade to another kernel, you'll have to rebuild the ALSA modules.</p> |
380 | <p>When you ever rebuild your kernel, or upgrade to another kernel, you'll have to rebuild the ALSA modules.</p> |
| 347 | <p>Although you might have installed <c>alsa-driver</c>, <c>alsa-libs</c> and <c>alsa-utils</c>, only the first will |
381 | <p>Although you might have installed <c>alsa-driver</c>, <c>alsa-libs</c> and <c>alsa-utils</c>, only the first will |
| 348 | have to be installed again, since it will put the alsa modules in |
382 | have to be installed again, since it will put the alsa modules in |
| 349 | <path>/lib/modules/*/kernel/sound/pci/</path>.</p> |
383 | <path>/lib/modules/*/kernel/sound/pci/</path>.</p> |
| 350 | <pre caption="needed after each kernel compile"> |
384 | <pre caption="needed after each kernel compile"> |
| 351 | emerge alsa-driver |
385 | # <i>emerge alsa-driver</i> |
| 352 | </pre> |
386 | </pre> |
| 353 | </body> |
387 | </body> |
| 354 | </section> |
388 | </section> |
| 355 | <section> |
389 | <section> |
| 356 | <title>/etc/modules.autoload</title> |
390 | <title>/etc/modules.autoload</title> |
| … | |
… | |
| 359 | load the correct modules at startup.</p> |
393 | load the correct modules at startup.</p> |
| 360 | <p>It's not necessary to add <c>snd-pcm-oss</c> or <c>snd-mixer-oss</c> in this file. |
394 | <p>It's not necessary to add <c>snd-pcm-oss</c> or <c>snd-mixer-oss</c> in this file. |
| 361 | Check the <uri link="http://www.djcj.org/LAU/guide/alsbook/faq1.html">this FAQ</uri> for more info.</p> |
395 | Check the <uri link="http://www.djcj.org/LAU/guide/alsbook/faq1.html">this FAQ</uri> for more info.</p> |
| 362 | </body> |
396 | </body> |
| 363 | </section> |
397 | </section> |
|
|
398 | |
|
|
399 | <section> |
|
|
400 | <title>Known bugs</title> |
|
|
401 | <body> |
|
|
402 | |
|
|
403 | <note> |
|
|
404 | This guide lags behind on the alsa-development. Chances are these bugs |
|
|
405 | are already fixed when you read this. |
|
|
406 | </note> |
|
|
407 | |
|
|
408 | <ul> |
|
|
409 | <li> |
|
|
410 | If you have <b>lots of noise</b> when using <b>oss</b> emulation, add |
|
|
411 | <e>options snd-pcm-oss dsp_map=1</e> to |
|
|
412 | <path>/etc/modules.d/alsa</path>. |
|
|
413 | </li> |
|
|
414 | </ul> |
|
|
415 | |
|
|
416 | </body> |
|
|
417 | </section> |
|
|
418 | |
| 364 | <section> |
419 | <section> |
| 365 | <title>More links..</title> |
420 | <title>More links..</title> |
| 366 | <body> |
421 | <body> |
| 367 | <p> |
422 | <p> |
| 368 | You could check these for additional info: |
423 | You could check these for additional info: |
| 369 | </p> |
424 | </p> |
| 370 | <p> |
425 | <p> |
| 371 | <ul> |
426 | <ul> |
| 372 | <li><uri link="http://www.gentoo.org/doc/desktop.html">The Gentoo Linux Desktop Configuration Guide</uri></li> |
427 | <li><uri link="http://www.gentoo.org/doc/en/desktop.xml">The Gentoo Linux Desktop Configuration Guide</uri></li> |
| 373 | <li><uri link="http://www.alsa-project.org">ALSA Project Homepage</uri></li> |
428 | <li><uri link="http://www.alsa-project.org">ALSA Project Homepage</uri></li> |
| 374 | <li><uri link="http://www.alsa-project.org/documentation.php3">ALSA Users Documentation</uri></li> |
429 | <li><uri link="http://www.alsa-project.org/documentation.php3">ALSA Users Documentation</uri></li> |
| 375 | <li><uri link="http://www.djcj.org">ALSA Howto's and FAQ's</uri></li> |
430 | <li><uri link="http://www.djcj.org">ALSA Howto's and FAQ's</uri></li> |
| 376 | <li><uri link="http://tldp.org/HOWTO/Sound-HOWTO/index.html">Linux Sound HOWTO</uri></li> |
431 | <li><uri link="http://tldp.org/HOWTO/Sound-HOWTO/index.html">Linux Sound HOWTO</uri></li> |
| 377 | <li><uri link="http://linux-sound.org/">Sound and MIDI Software For Linux</uri></li> |
432 | <li><uri link="http://linux-sound.org/">Sound and MIDI Software For Linux</uri></li> |
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