Any DVD player can play a DVD-audio disc. You just won't get the high resolution stuff if it's not a DVD-audio player. You will get either Dolby Digital surround or DTS surround or both. As far as I know, only a SACD player will play SACD's unless the SACD is a hybrid disc. That is it has a CD layer as well as a SACD layer.
Look on the front of the player. If it says DVD-Audio/Video player then it is a DVD-audio player. If it has the symbol on the top of this page:
http://www.superaudio-cd.com/
Then it is a SACD player.
Or just post your model and anyone can tell you what it can play.