ASK S&V

Q I have my Pioneer Elite SC-LX901 AV receiver connected to a 7.1 speaker system. When I press the SURR button on the remote, the receiver’s front-panel display shows all 7.1 speakers lit up and ready for action, but no sound comes out of the two Surround Back speakers. Do you have to watch a disc with a 7.1-channel soundtrack to get 7.1-channel sound, or can my receiver upscale a 5.1 soundtrack to a 7.1 format? The SC-LX901 is a Dolby Atmos-capable receiver, so I’d expect it to upscale 5.1 soundtracks for 7.1 output.—B. Hinson

Q I am looking to buy an AV receiver that can play music (mainly FLAC files) and movies streamed from a media server hosted on a NAS. Are there any new receivers that provide that feature? I was looking at a Pioneer VSX-832 Network receiver based on a recommendation from a local dealer, but discovered a note on Pioneer’s website saying that it’s not supported.—Gigi Mathew

Q I am building a dedicated 15 x 10 x 28-foot (WxHxD) home theater with two rows of seating and a bar for the third row. I plan to buy new speakers and am interested in the advantages, if any, of line-source over regular point-source designs. I’ve heard that line-source speakers create a larger stereo sweet spot. Is that the case? —Lorne Charles / via e-mail

Q Apple regularly gets flack for not offering Hi-res versions of its iTunes music catalog. I also hear that the quality of the DACs in the latest iPhones (Android phones, too) is not the greatest. Is there any device I can add to my iPhone that will coax the last bit of sound quality out of it?—Scott Oakley, Pine, AZ

A Can I link my Sony STR-DN1060 AV receiver with a Sony soundbar using its Zone 2 output? What I want is for the receiver to drive speakers in my main listening room and for the soundbar to play the same audio in a second room. —Lewis Starman / via e-mail

Q TV reviews in Sound & Vision routinely discuss support for the HDR10 and Dolby Vision high dynamic range formats. I don't always see comments about HDR support in AV receiver reviews, however. Does an AVR need to support a specific HDR format, or does HDMI take care of that? —James Hardaway

Q I'm a proud new owner of a Marantz AV7703 preamp/processor, which I use with a 7.0 speaker configuration (full-range fronts and no subwoofer).

Here’s my question: When I play a Blu-ray disc with a 7.1 DTS-HD Master Audio soundtrack, the pre-pro’s auto surround mode outputs it as DTS-HD + Neural:X (see above picture). But why would the processor create an upmixed signal instead of passing on discrete channel information to the back surrounds? I’m using an Oppo BDP-103 Blu-ray player with the audio output set to bitstream. —John F. Bartelt