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Got a tech question for Sound & Vision? Email us at AskSandV@gmail.com

Q: I have a Yamaha 7.1-channel AV receiver in my system that’s set up to power a 5.1 speaker system. Very seldom do I hear sound coming out of my surround speakers when watching movies on Blu-ray, though I do occasionally hear sounds like thunder. I have even boosted the output of the surround channels relative to the fronts, and it doesn’t make a difference. What’s going on?—Chuck Schumm / via e-mail

LG announced plans to launch its next-generation 55-inch OLED TV in late August.

Increasingly depressed and agoraphobic since her divorce, Adele (Kate Winslet) relies upon her doting son, Henry (Gattlin Griffith). At the start of the 1987 Labor Day weekend, mother and son are confronted by escaped convict Frank (Josh Brolin), who demands their assistance in eluding the authorities. Over the next few days, Frank’s kindness and innocence are manifest, and the trio has become a family—almost. Confused by conflicting emotions and threatened with the prospect of a competitor for his mother’s love, the awkward adolescent facilitates Frank’s capture. Adele has loved and lost again. Or has she?

In preparation for the launch of the first wave of Dolby Atmos-enabled products, Dolby is conducting press demos in New York and Los Angeles this week. Stay tuned for our reports later in the week. In the meantime, we touched base with Brett Crockett, director of sound research at Dolby Labs, to learn more about Atmos and its promise of taking home theater to new heights.

S&V: Why does the world need another surround format? What does Atmos bring to the home theater experience?
Brett Crockett: Dolby Atmos moves beyond the paradigm of channel-based audio, which has gone as far as it can in the home. Captivating sound surrounds you from all directions, including overhead, filling the room with astonishing clarity, richness, detail, and depth. The specific sounds of people, music, and things move all around you in multidimensional space, so you feel like you are inside the action.

S&V: How does the “object-based” Atmos system compare with the familiar channel-based system?
BC: Until now, cinema sound designers have had to mix independent sounds together into channels for soundtrack creation. A discrete sound, such as a helicopter, has been assigned to an individual channel rather than precisely to where it would occur naturally in the scene. While a sound can move across channels, there’s no height dimension. For example, you might hear the helicopter from a side channel (and speaker array) but not above you. This approach limits your audio experience because it can’t come close to matching the way you hear in real life, with sounds coming from every direction.