Thanks David!
Problem is not the Terminator. Not sure if it's a problem but the pi 3b set up has to be DSD(dop) for the Terminator to recognize as DSD. Set at DSD Direct (native) the SU-1 unit's led just pcm and the same with the dac as well. Don't want to start a debate dsd direct vs. dop but first impression the SU-1 is not that "smart".
Just a side note, pi set output at dsd direct and usb cable directly to the terminator not using the SU1, the dac recognize up to dsd256 no problem
Problem is not the Terminator. Not sure if it's a problem but the pi 3b set up has to be DSD(dop) for the Terminator to recognize as DSD. Set at DSD Direct (native) the SU-1 unit's led just pcm and the same with the dac as well. Don't want to start a debate dsd direct vs. dop but first impression the SU-1 is not that "smart".
Just a side note, pi set output at dsd direct and usb cable directly to the terminator not using the SU1, the dac recognize up to dsd256 no problem