Problems with .aif files

[firebird]

Hi,

I setup minimserver on my qnap nas. I want to play them to my dlna capable blue ray player. I ripped my cd's with itunes as .aif. using the "onboard" dlna server from qnap the .aif play fine, but high res .flac don't play. with minim server it's the other way: .mp3 and high res .flac play but for the .aif I see on the blue ray player just empty folder. using mconnect on iOS tells me "invalid location" and bubbleupnp on android says on the blue ray player that the audio format is not supported.

I also try with kid3 to covert the tags. but nothing changes after rescan.

Please help and thanks in advance