dac or transport

ok I'm looking at a ps directstream dac.  so, until I can afford a higher end transport, I have a mid-range cd player to connect by spdif cable.  I was wondering, to play the sacd layer of discs do both the dac & transport need that capability?  I don't have too many sacds' but was hoping the dac could differentiate the info the laser reading.  thanx  Matt