thank you for kind answer Nick! 

I set the internal clock (44.1khz) as a sync source when I checked analog I/Os.. no digi or word sync

definitely.. 

Even I never connect any input and output cable (eclipse itself) the inaudible signal exists and it fills

half of the right meter.. like some test tone keeps bleeding on right channel.. I'm really desperate..

I don't think it is involved with cable stuff (no wrong pin soldering),, please help me to fix my issue

thanks again