Created attachment 852014 [details] alsa-info.txt I'm trying to use the audio digital output (SPDIF IEC958) of my computer. After many hours of try-and-error, and a lot of searching in the internet, I have gotten it to work, but in a rudimentary and not friendly way: Command "aplay mysong.wav" works, so ALSA works, but KDE sound (for example, amarok) doesn't work. Why? Well, to get ALSA to work, I had to uninstall "alsa-plugins-pulseaudio" package, so "kde-settings-pulseaudio" too. If I re-install both packages, then ALSA doesn't work any more ("aplay" command doesn't work, and KDE sound doesn't work). So the only way to get a bit of sound through SPDIF is by uninstalling both packages. The thing is even more strange: For the "aplay" command to work, I had to run "alsamixer" command, and, after playing a lot with the controls, set the "S/PDIF Playback AC97-SPSA" item to zero. I don't know why. Additionally (it is probably normal), "S/PDIF Playback Source" item has to be set to "PCM", and "S/PDIF" item has to be enabled. Another strange thing: "Master" volume item has no effect in the volume, so the only way I can change the volume is by using my speakers' volume control. Volume can't be changed by software. As I said, I can get sound only by using the "aplay" command (it seems to be a command from ALSA). No sound in KDE apps. I would like to use Amarok, and use the KDE volume control. Phonon (the KDE sound system) seems to be well configured: - Audio hardware setup: - Sound card: Internal audio. (the only card in the list) - Profile: Stereo digital output (IEC958). - Sound device: Playback (Internal Stereo digital audio(IEC958)). (the only device in the list) - Connector: Digital Output (S/PDIF). (the only connector in the list) - Engine: GStreamer. (the only engine in the list) Perhaps the problem could be in pulseaudio or in gstreamer, or perhaps in ALSA, or perhaps in the communication between all of those components... I don't know. Is it me, or there are too many components? I mean: ALSA, Pulseaudio, Phonon, Gstreamer... It is a mess, too much complexity, an invocation to problems. Shouldn't it be more easy? Well, that was a philosophical question. Back to my problem... To help you to help me :), I have run the "alsa-info" command, that seems to generate a lot of information, and I'm attaching the output file to this thread. I will thank you for any clue on how to make sound (digital output) run on KDE. (I didn't know which Fedora component assign this thread to. I have assigned "phonon", but be free to re-assign to the correct one (perhaps alsa or pulseaudio or gstreamer or ...))
Most likely pulseaudio, reassigning. I dont know how to help diagnose what's going wrong here though...
Interesting: Analog output works correctly with all components (ALSA, Pulseaudio, Phonon, KDE volume control, Amarok, etc). The problem seems to be centered in the digital output.
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