Mark Linford wrote:
Hello, everyone:
I'm trying to enable sp/dif (digital) output with my new Fedora Core 4 (x64)
install, and I'm having a heck of a time trying to get it to work. Here's my
basic setup:
* Gigabyte K8VM800M motherboard
* Realtek ALC655 on-board audio
* Logitech Z-5500 surround speakers
I'm able to get sound via the analog outputs without problems, but nothing
comes from the digital output. As this is the first setup with digital
outputs I've ever tried, I'm at somewhat of a loss were I should even begin.
One interesting thing I did notice. My speakers have an lcd control panel
which can show if it's detecting a digital signal or not. Normally, this
shows "No Input Detected" when using the optical (digital) input on the
speakers. However, after playing around in alsamixer, I noticed that if I
changed the setting for IEC958 from "IEC958 In" to "Analog In", my speakers
detect a signal, though there's no audio coming out. IEC958 Output is set to
"00" (with no way to change it. IEC958 Playback AC97-SPSA is set to
"100" (also, when I move this slider up and down, I hear an audible "pop"
through the speakers). External Amplifier is set to "off," and I can't seem
to change that setting either.
So, I'm stumped. Any advice on how to proceed would be appreciated.
Mark
Well, I got it fixed. After a little more google'n, I found some helpful
info from the MythTV/Fedora HOWTO page:
http://wilsonet.com/mythtv/fcmyth.php#alsa
Specifically, I found this blurb:
"While enabling S/PDIF out for my Audigy was a matter of a checking a
box in gnome-alsamixer, some folks have reported having to set a
particular slider (IEC958 something-or-other?) to zero to enable the
S/PDIF output on their sound cards. Go figure."
So, looking at all of the sliders in alsamixer, set IEC958 Playback
AC97-SPSA to "0," and also set IEC958 to "PCM." Voila! Now, my sound's
coming out of the optical port. I don't pretend to know what I did, but
at least it works :)
