I am new to Sonar so I may not fully understand what you are asking but you can get some auto-tuning like effects by using V-Vocal.
Record (or import) a mono track, like a vocal. Convert it to a v-vocal track. On my default setup, it is a button that appears when I select the track that has audio in it. This should bring up v-vocal with your track loaded.
You can play with it an manipulate the audio until it sounds like what you want. I have done it but can't remember off the top of my head how to. There is a video on youtube where the guy shows you how to do it.
Good luck!