Hi all I have a current gen 27" iMac here, which I have hooked up to a receiver with the required cables, and the sound works. But, if for an extended periode of time, like 15 seconds, no music or whatever is playing on my iMac, the light of the optical cable goes out. This has the annoying side-effect that for example in Adium, when someone logs on or off, I usually only hear about half of the logging on/off sound. The same with music, sometimes a second passes before the music actually starts playing through my speakers, even though it is playing in iTunes. I don't have this problem with the built-in speakers, nor with headphones... What I find bizarre is, that I found an anecdote of someone with a 2008 iMac, who said that the light on his optical cable always stays on, even if there's nothing playing on his iMac... So my question kind of is: can I force my iMac to keep that red optical light on, whether or not something is playing?