やっとHDMI通じて音声が出た
とりあえず、色々とググっていたら http://xbmc.org/forum/showthread.php?t=54705&page=15 にて、ASRockの同じ製品を使っている方のフォーラムで設定ファイルを公開してくれている方がいたので、さくっとホームディレクトリの.asoundrcにコピーしたら、ディスプレイ内蔵のスピーカーから音が出ました秊 # ~/.asoundrc or /etc/asound.conf # ALSA configuration file ##### USAGE ##### # Save this file as "~/.asoundrc" (for user-specific sound configuration) or # "/etc/asound.conf" (for system-wide sound configuration) and specify ALSA # device names ad described in the next section. ##### DEVICE NAMES ##### # This configuration file defines four devices for use by the user. Those # devices are "analog", "mixed-analog", "digital", and "mixed-digital". The # user may also re-define "default" to be identical to one of the above-named # devices (i.e. to send all sound output to the digital output unless otherwise # specified). Use the device names as described below: # - "analog" outputs to the analog output directl