The LifeSize Icon 600 is a nice little codec for basic conference room applications. However, once you go beyond a basic system that can use the LifeSize mic pod or the LifeSize 2nd Generation phone system for audio input, you have to get a little creative on how to get audio into the codec. (Previous post showed how to make the audio input redirect to the HDMI output for local PC audio output).
I have really liked using the ClearOne Ceiling Mics over the years and they have proved to work well with a variety of mixers and DSPs (If you read the manual, ClearOne makes it sound like there is no way it will work unless you use a ClearOne solution). Recently we installed several icon using the Clearone mics and a simple mic-mixer that fed directly to the icon. Note: The Icon has to do the echo cancellation, there is no way to turn it off yet.
But that left the problem of how to get the PC audio into the unit when the one audio input is being used by the mic mixer. Luckily, the DVI input supports audio (yes, I know that is not part of the DVI standard). In the case where we were using a Kramer presentation switcher, it was very easy to just take the HDMI out of the switcher (which has audio) and use the LifeSize provided HDMI to DVI cable to connect the switcher to the codec. Of course, this would also work with any computer that can provide an HDMI output.
However, we often still find PCs that are using a standard HD-15 VGA plug, and a 3.5mm audio output, making it a bit more tricky. Luckily, we found a little connector that will take a DVI to VGA+3.5mm Audio. The cable was designed for going from DVI to VGA and de-embedding the audio from the DVI (so the audio port is labeled Audio Out), but it seems to work well in the other direction as well. Right now, I have been purchasing them off of ebay (Search for “DVIto VGA output Video adapter with Stereo Audio Cable ForProjector monitor3.5mm”, currently listed here).