32 bit audio problems with Squeezebox2

I have LMS version 8.0 running on a jail in Freenas server version 11.2. Connection to my AVR is done with an old Squeezebox2. LMS installation is done using Simone’s script on audiodigitale-eu.

This system cannot play certain 32 bit audio formats from hi res internet radio stations. For example 32 bit flac or AAC 32 bit does not play. However WMA2 32 bit plays fine.

I assume transcoding should be possible. How could I make these work?

Thanks in advance
Jussi