OpenAL + ALSA [+ PulseAudio]

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hi,

I would like to switch my audio device for "supertuxkart" ("STK") to
ALSA/HDMI-audio. STK uses OpenAL which can be configured to use ALSA:
  http://supertux.lethargik.org/wiki/OpenAL_Configuration

Here are the devices on my (ALSA) system:

$ aplay -L
default
    Playback/recording through the PulseAudio sound server
hdmi:CARD=MID,DEV=0
    HDA Intel MID, HDMI 0
    HDMI Audio Output
sysdefault:CARD=PCH
    HDA Intel PCH, ALC887-VD Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    Front speakers
surround40:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Digital
    IEC958 (S/PDIF) Digital Audio Output


$ aplay -D hdmi /usr/share/sounds/purple/send.wav
works fine (unless HDMI audio is used by, say, amarok in which case I
get "audio open error: Device or resource busy").

So I tried this in ~/.openalrc:
-------------------
(define devices '(alsa))
(define alsa-out-device "hdmi:0,0")
(define speaker-num 2)
-------------------

But I don't get any sound via HDMI-audio. What can be observed is that
"aplay -D hdmi ...wav" breaks when amarok is running using HDMI-audio
("audio open error: Device or resource busy"), _but_ when running "aplay
..." while supertuxkart is running it plays successfully.

I also tried to use pulseaudio ((define alsa-out-device "default")):
- open supertuxkart
- start "pavucontrol"
- in the tab "Playback" I see the "SuperTuxKart" Playback Stream
- I cannot select "Internal Audio Digital Stereo (HDMI)", it immediately
  reverts back to "Internal Audio Analog Stereo"!

BTW: is it possible to use mixing with the HDMI-Audio device so that amarok +
other ALSA devices can use ALSA with HDMI-audio at the same time?

Thanks and Best Regards,
-- 
Felix Natter


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