I recently purchased a Saffire pro 24 DSP as I wanted to take advantage of the comfort reverb etc. available when recording my vocals.  While I can hook up the unit to the computer and get Sonar Platinum and everything else from the PC to playback through the unit, I need step by step instructions on the following-

• How do I set up the Saffire with Sonar to record a completely clean vocal while being able to hear the reverb and compression from the DSP chip on the unit potentially both through monitors and speakers.

I have watched all the various youtube videos on the subject and read the manual but just simply don’t get how I manage to do what I require.  As I am also fairly inexperienced both using Sonar and with the technical side of recording a very simple bullet pointed step by step guide would be greatly appreciated.
 
If anyone is using this interface to monitor/record in Sonar your help would be greatly appreciated- Thanks in advance.

This is the best tutorial for MixControl usage I know of.
 
The quickest answer to your question is on page 20 of the Saffire PRO 24 DSP User Guide. Saffire units have an embedded loopback feature, and the inputs show up in SONAR as "Loopback 1/2." If you click the "Input FX" button and select "Router" the Loopbacks are in the lower right of that section. Setting these to "Anlg In 1/2" will loopback the dry signal to the Loopback 1/2 inputs (FX(Anlg 1/2) have the FX baked in). The "Monitor1/2" at the top center can be set to "Mix 1/2" and you will hear everything (FX, reverb) you are doing inside the box (Line Outputs 3/4 can also be set to Mix 1/2 if sending to headphone 1, etc.).
 
Quick Edit: If you are doing the above, it is best to also mute the track you are recording inside SONAR, so that your mix isn't including the latent signal coming back from SONAR to your monitor/headphones.

Firstly I assume you have installed the latest driver from Focusrite website.
 
 
Check this for starters:
https://www.youtube.com/watch?v=_rD2Jrl-FZM
 
If you can hear a dry vocal through mix control you are are one step of the way. Now mute it in mix control:
https://youtu.be/M1avPHhiGw8

Are you are able to route your vox directly into Sonar? (Via input, make sure you switch echo on)? If you can hear it you can then add a reverb plugin. For most people this is job done (this is the method I use):
https://www.youtube.com/watch?v=6LOpAPhfDeU
 
Here's a method to route an effects send:
https://www.youtube.com/watch?v=RPZl39yIcjM
 
If you want zero latency you use a combination of both. In Sonar set your plugin so all you can hear is reverb (100% wet), you can then unmute mix control (dry vocal).. Job done. I don't bother with zero latency myself nowadays but it's definitely worth knowing how to do it, you paid for the hardware.

Thanks people, this means it all finally makes some sense and I have been happily recording a completely dry vocal all day while using the interface's dsp chip to give me a slightly compressed and comfort reverb headphone mix to work with.
 
Once again thanks for your help.
 
J