Transcode AC3 5.1 to DTS

Hi.
my setup:
-LG TV
-TOSLINK to Logitech Z906 5.1
-OSMC on Pi
Passthrough only works with DTS sound, don't know why.
I'm looking for a profile that transcodes AC3 5.1 to DTS 5.1.
Very nice would be if AC3 2.0 and PCM 2.0 get transcoded to DTS 4.1
greetings
Carsten
my setup:
-LG TV
-TOSLINK to Logitech Z906 5.1
-OSMC on Pi
Passthrough only works with DTS sound, don't know why.
I'm looking for a profile that transcodes AC3 5.1 to DTS 5.1.
Very nice would be if AC3 2.0 and PCM 2.0 get transcoded to DTS 4.1
greetings
Carsten