Iv accomplished this effect in other DAWs or through various VST plugins and even manually adjusting these thing s myself. Im a long time Sonar user so you can assume I know my way around the program fairly wel but iv not really dabbled in the Midi part much. Does anyone here know how to chop a vocal to create a sample to assign to Midi notes on Sonar?

you need to use a sampler (vsti).

Thank you, is there one contained within Sonar? In the other DAWs iv usually seen it done through the drum program etc..

Session Drummer 3 allows you to drag/drop samples onto kit pieces. if you do not want the hassle of creating sfz files, multiple instances of SD3 would work.
 
Dimension Pro, Matrix View, and several other options also exist.

Woodyoflop

Vocal scatter

Iv accomplished this effect in other DAWs or through various VST plugins and even manually adjusting these thing s myself. Im a long time Sonar user so you can assume I know my way around the program fairly wel but iv not really dabbled in the Midi part much. Does anyone here know how to chop a vocal to create a sample to assign to Midi notes on Sonar?

 
 
At the risk of showing my ignorance here, what the heck is vocal scatter?

Honestly not sure of the technical name of it but iv always heard it referred as and referred to it as a Vocal Scatter. Basically taking a word or part of word usually triggered by Midi input or a plugin and kinda scatters difference parts of the word or syllables across the stereo image. Usually accompanied by a a vocoder for special effect sounds. Can prolly look it up on YouTube, fairly common. My description of it most likely isn't the best lol.
Stutter edit from Izotope can be good for this if u wanna spend time programming it as none of the presets really do it how i usually need.

Scatter is new to me, too.
 
To do your own you could consider manually cutting up a vox sample
into clips, then set whatever panning, fx etc. you like to each clip.
 
Setting up a sample player for MIDI strikes me as too much additional work.

If you have Stutter Edit, you might want to consider delving into that more deeply. If you chop up a vocal manually then change your mind or want to try different slices, you need to do it again. The sliders on the controls to Stutter Edit allow for quick editing of things once you know what they do, and none of the underlying material is modified. Each preset is assigned to an individual key, so there are a truckload of presets. Most include "Stutter" enabled, so folks do not realize that if you shut that off you can do a lot of audio manipulation without the stutter. That particular program is one that needs a read of the manual, it is a bit complex and not obvious at times, but easy to modify once you understand it.

I believe Cakewalk's Cyclone plug in does this, although its 32 bit. I have also been able to use the matrix view by splitting the clip and drag n' drop the individual splits to its own matrix slot or "pad", assign controller keys to the slots via midi learn, and then you can have each slot trigger the split for one-shot, loop, instantaneous, etc.
StutterEdit is much easier, though.

mettelus
... If you chop up a vocal manually then change your mind or want to try different slices, you need to do it again.

If you don't bounce, the full underlying wave file remains under each clip.
So you could delete all clips except one, then open the clip to reveal the full audio again.
 
And you can move the edges of the clips, stretch or shrink clips both in time (Ctrl+Shift) or just in length,
merge two clips together, cut them again elsewhere, fade in/out...
 
You also have the Loop Constructor at your disposal.