I don't know much about this AVR yet but it looks like the Yamaha RX-A820 seems at first glance anyway to have Room Control that sounds similar to Trinnov. The RX-A820 also has a feature called "center lift" which in a unique feature of Trinnov that lifts the center speaker's sound to the center of your TV screen. It also mentions 3D sound like Trinnov:

"CINEMA DSP 3D provides a wide, high and dense sound field. HD Audio format decoding lets you enjoy HD Audio sources. Virtual Presence Speaker delivers 3-dimensional sound without actual use of Presence speakers. "

Curt from AVS/Trinnov responds when asks how is compares:

"Hi All

There are several 3D algorithms on the market that have real benefits to users- the discussion above indicates that Yamaha may have such a system and that it performs well. There are others that add wide channels, etc as a static choice (meaning that it's a fixed system). These implementations differ greatly from Trinnov Remapping, as Remapping is an active, automated process that takes place in your listening environment based on your physical arrangement.

3D Remapping

Allow me to help clarify 3D Remapping, as implemented by Trinnov, vs what you may find in other units. As Jeff has indicated above, the real distinction to the very specific term coined by Trinnov, "2d or 3d Remapping" refers to the ability to locate speakers in a listening environment, and correctly position the acoustic image spatially, regardless of speaker placement. This capability is both unique and covered by international patents. The math involved requires the use of a Fourier Bessel transform, which required years of development to get right. The definition of 3D remapping applies to this process which differs from all other 3D solutions because, unlike all other systems, it's not static, and it truly separates the input channels from the speakers. Sounds become objects that are properly steered to their correct spatial orientation, regardless of speaker placement.

Center Channel Imaging Example

Let's take the case of the low center and add an additional variable that can happen in many systems: the L/R can't be symmetrically placed, such as a widely placed right speaker. The static system (ie Yamaha's) may be able to have an adjustment to "elevate the center," but the listener would then still have a image/spatial error of a wide image smear on the right side. As as more center elevation is added, the center image will shift to the right, pulled by the widely placed right speaker. Actually all information coming from the center an right speaker in this example would be smeared right and spatially distorted. Such errors do not occur with Trinnov Remapping, regardless of placement.

As for those of you trying to elevate the center image using Trinnov, the horizontal plane of the microphone combined with the height of the surrounding speakers will determine the image elevation. Remember that 2D does not correct height, only angle. Cinema = +/- 24 degrees L/R, Music = +/- 30 degrees (a wider frontal image). Music remapping is to the ITU standard, providing very accurate spatial reproduction for surround music content. BTW, my favorite 7.1 configuration for rooms that are wider then deep, with seating not far from the rear wall is to setup a traditional 5.1 placement, then add two wide speakers at about 50-60 degrees. With remapping, really fills in the front hole between the fronts and backs. Again, no need to have the wide speakers exactly symmetrically placed (doors, openings, windows, get in thre way of this), as Remapping will account for this.

I hope this helps clarify the important distinction of what Remapping is.


Anyone had experience with this Yamaha RX-A820?