Sound on ALIX.3D3
The AMD CS5536 Geode on the ALIX.3D3 board has an included audio controller which headset output and microphone input is populated on the board. lspci lists the audio controller as
00:0f.3 Multimedia audio controller: Advanced Micro Devices [AMD] CS5536 [Geode companion] Audio (rev 01)
ALSA (Advanced Linux Sound Architecture) supports this chip. To use audio on the board, some adjustments to kernel are needed:
Device Drivers --->
<*> Sound card support --->
<*> Advanced Linux Sound Architecture --->
[*] Dynamic device file minor numbers
[*] PCI sound devices --->
<*> CS5535/CS5536 Audio
After compiling and installing the kernel, we need to install ALSA userspace tools:
emerge -va alsa-headers alsa-lib alsa-utils
After rebooting the kernel should recognize the sound device:
[ 2.830979] cs5535audio 0000:00:0f.3: PCI INT B -> Link[LNKB] -> GSI 11 (level, low) -> IRQ 11 [ 2.842814] cs5535audio 0000:00:0f.3: setting latency timer to 64 [ 2.850457] ALSA device list: [ 2.863735] #0: CS5535 Audio cs5535audio at 0xfe00, irq 11
Now it’s time to setup the audio channels. Run
alsamixer
unmute and pull up the Headphone and PCM faders. Unmute “Mic Boost” and change to the Capture View and pull up Capture there. It should look like
You can navigate with the left/right keys, change the volume with the up/down keys, mute/unmute with M, change between Playback/Capture/All with TAB and quit with ESC.
J12/J13 on ALIX.3D3
Now connect a headphone oder speakers to J12 (headphone output) and run
speaker-test -twav -c2
You should hear a female voice saying “front left” and “front right” on the corresponding channel. Cancel the test with Control+C. Now connect a microphone to J13 (microphone input) and run
arecord -d 5 -f cd -t wav /tmp/mic-test.wav
You have 5 seconds to make some noise. Afterwards run
aplay /tmp/mic-test.wav
and you should hear the previous made noise. Finally do
rc-update add alsasound boot
so that ALSA can save/restore your settings on reboot.
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