I need help to play optical-audio out from a pico-itx px10000g in a
Serener GS-L08 case (which has an optical-audio connector).
I connected a Klipsch 5:1 system to the pico case via a standard
optic-audio cable.
Then I tried aplay and play to send sound out the optic port, but have
had no success.
This is my first optic audio system, so maybe I'm missing something
simple.
I turned the volume on the Klipsch system up to +25, and in alsamixer
all levels where maxed.
In alsamixer, I notice there is no volume level change allowed for
IEC958, but there is a volume level bar for the other items (Master F,
PCM, Front, Line, Mic).
Example of what IEC958 looks like in alsamixer.
----
|00|
----
IEC958
I can play sound through head phones attached to the front rca plug.
Details below:
#-------------------------
I use the in-kernel snd_hda_intel driver in a 2.6.23-gentoo-r3 kernel,
with the following options.
Device Drivers --->
Sound --->
<*> Sound card support
Advanced Linux Sound Architecture --->
<M> Advanced Linux Sound Architecture
<M> Sequencer support
< > Sequencer dummy client
<M> OSS Mixer API
<M> OSS PCM (digital audio) API
[*] OSS PCM (digital audio) API - Include plugin system
[*] OSS Sequencer API
<M> RTC Timer support
[*] Use RTC as default sequencer timer
[ ] Dynamic device file minor numbers
[*] Support old ALSA API
[ ] Verbose procfs contents
[ ] Verbose printk
[ ] Debug
Generic devices --->
PCI devices --->
<M> Intel HD Audio
<M> VIA 82C686A/B, 8233/8235 AC97 Controller
<M> VIA 82C686A/B, 8233 based Modems
#-------------------------
I tried versions 1.0.14 and 1.0.15 of the following gentoo alsa packages
media-libs/alsa-lib
media-libs/alsa-oss
media-plugins/alsa-plugins
media-sound/alsa-firmware
media-sound/alsa-headers
media-sound/alsa-tools
media-sound/alsa-utils
media-sound/alsamixergui
#-------------------------
lsmod |grep hda
snd_hda_intel 216732 0
snd_pcm 47492 2 snd_pcm_oss,snd_hda_intel
snd 33508 8
snd_pcm_oss,snd_mixer_oss,snd_seq_oss,snd_seq,snd_seq_device,snd_hda_intel,snd_pcm,snd_timer
snd_page_alloc 10504 2 snd_hda_intel,snd_pcm
#-------------------------
lspci -v
80:01.0 Audio device: VIA Technologies, Inc. VIA High Definition Audio
Controller (rev 10)
Subsystem: VIA Technologies, Inc. VIA High Definition Audio
Controller
Flags: bus master, fast devsel, latency 0, IRQ 20
Memory at 9fffc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+
Queue=0/0 Enable-
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI
00
Capabilities: [100] Virtual Channel <?>
#-------------------------
Alsa mixer shows no volume adjustments for IEC958.
Card: HDA VIA VT82xx
?
Chip: VIA VIA VT1708
?
View: [Playback] Capture All
?
Item: IEC958
----
|00|
----
IEC958
#-------------------------
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