takes several hours to decode few minutes of audio. of course, there is optimized version for x86, which performance is close to that of PS3. however, my points here are two - first, the importance of optimizations; second, i'm quite sure ARM CPUs in ODROID-X will need at least hours if not days to deal with DST multi-channel decoding, showing with that their real performance for multimedia applications. so, also that as suggestion - build the reference DST decoder and run it on ODROID-X - even if you wish try to optimize it as much as possible for ODROID-X hardware and see the results.
And you are so sure because you tried yourself to implement DST on ARM or have a reference that proves you're not just doing unsustained claims?