Difference between revisions of "ALSA"
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==Installation== | ==Installation== | ||
| − | + | *Make linux-menuconfig | |
Device Drivers ---> Sound ---> <M> Sound card support | Device Drivers ---> Sound ---> <M> Sound card support | ||
Device Drivers ---> Sound ---> Advanced Linux Sound Architecture ---> <M> Advanced Linux Sound Architecture | Device Drivers ---> Sound ---> Advanced Linux Sound Architecture ---> <M> Advanced Linux Sound Architecture | ||
| Line 32: | Line 32: | ||
[ ] Dynamic device file minor numbers (NEW) | [ ] Dynamic device file minor numbers (NEW) | ||
[*] Support old ALSA API (NEW) | [*] Support old ALSA API (NEW) | ||
| − | [ | + | [ ] Verbose procfs contents (NEW) |
| − | [ | + | [ ] Verbose printk |
| − | [ | + | [ ] Debug |
| − | [ | + | [ ] Debug detection |
[ ] Enable PCM ring buffer overrun/underrun debugging (NEW) | [ ] Enable PCM ring buffer overrun/underrun debugging (NEW) | ||
Generic devices ---> | Generic devices ---> | ||
Revision as of 16:50, 1 September 2008
This page will summarize the informations to use ALSA on your Armadeus boards.
Introduction
ALSA stands for Advanced Linux Sound Architecture and provides audio and MIDI functionality to the Linux operating system. Everyone wanting to write portable & state of the art Linux applications dealing with sound should consider using ALSA.
ALSA Soc
On the APF boards we are going to use Embedded version of ALSA: ALSA Soc ->
- http://opensource.wolfsonmicro.com/node/6
- http://www.rpsys.net/openzaurus/patches/alsa/info.html
- http://alsa-project.org/main/index.php/ASoC
nodes creation
in /dev/snd
mknod controlC0 c 116 0 mknod pcmC0D0c c 116 24 mknod pcmC0D0p c 116 16
Installation
- Make linux-menuconfig
Device Drivers ---> Sound ---> <M> Sound card support Device Drivers ---> Sound ---> Advanced Linux Sound Architecture ---> <M> Advanced Linux Sound Architecture ALSA ARM devices ---> <M> IMX TSC2102 alsa driver
<M> Advanced Linux Sound Architecture
< > Sequencer support (NEW)
<M> OSS Mixer API
<M> OSS PCM (digital audio) API
[*] OSS PCM (digital audio) API - Include plugin system (NEW)
[ ] Dynamic device file minor numbers (NEW)
[*] Support old ALSA API (NEW)
[ ] Verbose procfs contents (NEW)
[ ] Verbose printk
[ ] Debug
[ ] Debug detection
[ ] Enable PCM ring buffer overrun/underrun debugging (NEW)
Generic devices --->
ALSA ARM devices --->
USB devices --->
System on Chip audio support --->
modprobe soundcore modprobe snd modprobe snd-timer modprobe snd-page-alloc modprobe snd-pcm modprobe snd-pcm-oss modprobe snd-mixer-oss
Only if MIDI sequencer used:
modprobe snd-seq modprobe snd-seq-device
Specific to DevFull:
modprobe spi_imx modprobe snd-imx-alsa-tsc2102
Test
# aplay -lL # aplay -vDhw:0,0 /usr/share/sounds/alsa/Side_Left.wav
