Audio through HDMI and RCA?

Originally Posted by crawdad62 

I'm going to be hooking up my Logitech F540 wireless headset to use with the XBox360 which I currently have hooked up to the TV through HDMI. HDMI is sending both the audio and video to the TV. I ordered a dongle from Monoprice that allows an analog audio connection via RCA. I plan to run the RCA cables off the dongle and into the wireless transmitter for the headset but I want to be able to still have audio if I want it play through the TV via HDMI. I'm wondering if the XBox 360 allows multiple audio outputs simultaneously? Thanks.