My configuration is:
Bitstreaming --> none
Output encoding --> Dolby digital (5.1)
Result: crash
Otherwise:
Bitstreaming --> none
Output encoding --> none
Result: only stereo
I am using an external USB transport that can pass Dolby and DTS to A/V receiver via spdif cable (as I said before, this configuration is working fine with Windows version of JRiver).
In Alsa configuration is selected iec958: