So that you guys know, there is an issue with delays in the whole D&M Dirac upgradable range.
I have been messing with Dirac the last few days.
I believe I have discovered a quite serious bug that also existed for the Onkyo RZ50 before it was fixed by a firmware update.
I checked the speaker distances after a Dirac calibration
Notice how they nearly all are at 20 ms ?
Then I read the troubleshooting FAQ for Dirac Live and stumbled upon
Troubleshooting: By Firmware raise the 20ms delay limit on Onkyo - Dirac Live Support - Confluence
I checked the graph for impulse response on the Dirac Live app, selecting all speakers
So, Denon, as Onkyo previously, has set the max for speaker Delay (Distance) to 20ms....
When Dirac time aligns the speakers, it asks for a larger than 20ms delay to be used.
The AVR cant set a larger delay than 20ms so sets it at 20ms which makes the distance calibration WRONG.
I have opened a ticket at the Dirac helpdesk, so hopefully they can ask Denon to raise the limit of the delay and fix the issue.
It seems logical that since the issue existed with Onkyo, Dirac upon the implementation of Dirac Live for D&M receivers, should have checked that the same issue didn't exist.
Yet Dirac didn't !!
Lets hope this gets solved in a future firmware update