I'm have look for information for codec support for de Xperia Z5 wich it's supossed to used LDAC for HiRes audio files. That's for the real, since I have the h.ear model. It works awsomely but I just look in aptx info about if Xperia Z5 support that format, I'm recieved a gift that happens to be a bluetooth necklaces aptx HD but I do not know if it will work as awsome as the h.ear.
At the page of aptx from qualcomm Xperia Z3 appears as compatible model (it's a very similar model like de Xperia Z5) but the Xperia Z5 didn't show up so... does any one knows wich formats xperia Z5 allows to work with?
