[all variants] Audio skipping every 30 seconds through HDMI

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http://ubuntuforums.org – Hi all. I'm running Kubuntu 12.10 64 on an ASUS eeebox 1501. It runs an older NVIDA ion system. I recently got a surround sound system and have managed to get ubuntu to play audio via the HDMI out (took a while to figure out I had to unmute S/PDIF). The problem is that when playing most audio files, the sound skips every 30 seconds (almost exactly, e.g. skips at 0:30, 1:29, 1:59). It sounds like it's being briefly disconnected and reconnected, and the lights indicating signal to speakers on the receiver flash off for less than a second. This seems to happen whenever I'm playing 44khz audio. (Hardware)