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Q I recently upgraded my TV to an LG 65B7P OLED. My receiver is an older Pioneer model that I'm loathe to give up. I plan on using an Xbox console, either the One S or the forthcoming One X, as my 4K source. Here’s my problem: both Xbox versions provide only a single HDMI output. I know I could use the TV’s HDMI ARC port to route audio back to a receiver, but my Pioneer doesn’t support that feature. Another problem is that HDMI ARC doesn't support the Dolby TrueHD and DTS-HD MA lossless audio codecs. Which gets me to my question: Is there some kind of HDMI splitter I can buy that will let me route the Xbox’s output separately to the TV and AVR? —David Becker

A I’ve seen references to MQA. What is it? —Phis Tomaskovic / via e-mail

Q I’m in the process of rebuilding my home theater with a 4K projector and flat-panel TV. Here’s my question: What kind of HDMI extenders can I use to pass a video signal with Dolby Vision high dynamic range (HDR) from my receiver to both screens? I’m completely at a loss here. —F. Hudson Miller, Hollywood, CA

Q I want to install a projector. Due to my room’s layout, screen width would be limited to 72 inches, and the projector would need to be mounted 16 feet away from it. I've messed with screen calculators for several projector brands and have concluded that I'm out of luck: a projector mounted at that distance would require a much larger screen. Do you know of any projectors that would work in my situation? —Stan Silverman

Q I have a question about streaming audio from my PC to an A/V system located in another room. I want to be able to stream my vast collection of FLAC audio files along with Internet radio to an Integra DTR 5.9 A/V receiver. Running an Ethernet cable wouldn’t be my first choice; I have a strong Wi-Fi signal throughout the entire house and would like to use that instead for streaming. I've looked at the Sonos and Nuvo systems and the WD TV Live box. Each of these options seems to have good and bad points. But I’ve also thought about buying an inexpensive laptop and connecting it to my A/V system with a portable USB DAC. Can you recommend a solution? —John Hanlon / Encinitas, CA

Q I’m planning on buying an Epson 5030UB projector. My sofa will be 14.5 feet from the screen. The room has controllable dimmers, and there will be some room light when I watch games. What screen size and type would you recommend? — Lou Gutierrez / via e-mail