Problem statement: Marantz AVRs (need to confirm it’s only for this brand) incorrectly play the DSOTM Atmos test tones and music on the height speakers. Information on the rear height channels is played at the same time on front and rear height channels. Issue was detected with DSOTM blu-ray because it has got the test tones, but we cannot know if this problem is happening with any other blu-rays or streaming content in Atmos.
Two users reported the problem so far, and both have in common that Auro-3D is enabled in the AVR and rear height speakers are configured as SHL and SHR (Auro-3D recommended configuration) as opposite to RHL and RHR (Atmos recommendation).
In my case, when configuring the rear height speakers as RHL and RHR, the AVR test tones work perfectly in all speakers, but any real Atmos content (no matter if it’s streaming or Blu-ray, real songs or test tones) is only played through the front height speakers. All content sent to the rear height speakers is not played. Restoring the configuration to SHL/SHR makes all test tones and Atmos content to be played fine (apart from DSOTM).
This behavior puzzles me, as despite the usage of SHL and SHR is a recommended configuration, I believe the regular configuration for Atmos based on RHL and RHR should work.
I even tried to disable Auro-3D and then configure again the rear speakers as RHL and RHR or THL/THR and Atmos is only played in FHR/FHL or THR/THL.
I haven’t tried to restore to factory default settings the AVR or running Audyssey after changing the Amp assign, but as I get the same behavior with and without Audyssey, I don’t think this should have any impact.
My request here for all Marantz/DSOTM owners would be to fill in the form below:
• Marantz AVR model (mine is SR7011)
• Do you have Auro-3D enabled? Y/N (in my case is Y)
• Do you have regular height speakers or in-ceiling (top) speakers? Mine are regular height speakers
• Which configuration do you have for rear height speakers? RHL/RHR or SHL/SHR? I have SHL/SHR, but my rear speakers are located on top of the surrounds back (less than 5º behind the listening spot)
• Does DSOTM test tones play correctly in the rear heights for you? As I commented, test tones aimed only for the rears, are played at the same time in the fronts and rears
Let’s see if we can get to any conclusion based on the survey. Hopefully is some misconfiguration on my side and not a SW bug.
Note: there has to be something different with the Atmos encoding of DSOTM, but God nows what it may be... The fact that so far only Marantz AVRs are failing to decode it properly may be an indication of a Marantz's misinterpretation of the Atmos standard... or not!