First I would line to thank you very much for your very positive help and your prompt réactions.
I tried the two channels option and Dolby digital configuration ( supported by my TV according to Sony specification) without success. I also tried the same MP2 files on a Panasonic TV and......it works fine, with a perfect audio.
I conclude the inputs of the FZ DMC 2000 Lumix (( Panasonic), one of the most popular Cam recorder is compatible with PD 15 and PD 365. We do not understand why the new version should not support any more our TV Sony!
The ascending compatibility is the golden rule in this business!
As soon as Cyberlink advertises PD 15 customers with attractive offers to upgrade the PD 365 version, Cyberlink is committed to deliver the functionality of previous versions on top new improvements.
It is now to Cyberlink to react to my support request and to fix the problem..
In the meantime I am afraid I will have to continue to use the PD 15 version that works very well!!!