Is there a reason....

[eurosport]

I've run simultaneous outputs of ROKU, no issues. Odd. Maybe model-specific issue? Picture size ratio different on standard video if HD is in use, but it still works!

And, no problem with MicroHD doing same.

This one is a Roku 2 XD. Which one do you have Radio?

[Mochuf]

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ADVERTISING BOX

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I've run simultaneous outputs of ROKU, no issues. Odd. Maybe model-specific issue? Picture size ratio different on standard video if HD is in use, but it still works!



And, no problem with MicroHD doing same.

You probably have an older model. The Roku 2 boxes allow audio on both HDMI and analog at the same time, but analog video is shut off when an HDMI cable is plugged into the box.