what is an SBR sound board feed?
yes, you'll want to attenuate. either at or before the korg's input.
future of playback?
hopefully, we'll be mastering our own SACDs at some point. otherwise, we just have to settle for what *we think is superior* mastering yielding kick ass PCM recordings.
I"m still very happy with redbook. so DSD>PCM (redbook) is A-OK w/me.