Ok, thanks for the AAC settings will try it out.
The problem I had with the new Zenear BT begin with that the left one was dead when I unpacked them.
The right one was working and the charging box was fully charged, so uh-oh I thought - bad omen, left one DOA?
I tried getting it to charge, it did not seem to want to.
I ended up cleaning the contacts with chemically pure gasoline, and first after that would it charge normally.
Then when I was trying to pair them, I would get two separate "Asus Zenear BT" to choose from - left and right, each would pair separately, but not together, no clue how to fix it. New driver necessary I was thinking.
After turning on and off and doing a full reset (holding their buttons down for 10 sec.) a couple of times, I noticed the right one would first pair with the left one, and then only the left one would be available for pairing with the Z6.
That is apparently how many of these BT earbuds work, I found out later - have not had any before.
So now everything seems to be working correctly, will try the AAC.
Suggestion for Asus quality control - clean the contacts with suitable solvent before final packaging.