HI:)
 
>>>space (stop), then control z (undo record), and then r (record)
>>>over and over and over and over....
 
Why don't you just do a Loop Record?? I mean Autopunch with a loop....
 
Bassman.
 

That would be a good solution, if you're trying to repeatedly do the same small take.
 
But sometimes you're playing a complex section that's quite long, or improvising a solo, and whereas sometimes you get through the whole thing before thinking you want to delete it and repeat, other times you only get 1 bar in and mess up. So you want to stop immediately and repeat, not wait for the whole 32 bars to expire before the loop starts again (for example).

Just a thought - anyone using VoiceAttack (http://www.voiceattack.com/) with Sonar?  It interfaces with the built in Windows speech recognition but gives you a lot more macro flexibility.  I've used this with games such as Elite:Dangerous to great effect (and you can also have it echo responses back to you).  But reading this thread made me wonder if it could be useful in this situation.
 
I could be a tape-op all over again!  'Again...', 'Again...', 'Keep'.
 
Worth trying as long as you're not doing vocals.  Although even then you can set a trigger phrase to make it listen (such as 'Sonar...Again' etc).  Fully functioning version has a 21d free trial period, and the cost after that is a recession beating $8.

I can vouch that Alexey (Aslow3) can set you up with a way to make a control surface do what you want here, if he says it's possible. He's sort of a kindly control surface wizard. I would take him up on the offer. You'll probably learn something in the process, and realize that if you have just about any kind of control surface, you could (with a bit of setup and fiddling) be doing crazy things with it in Sonar. The plugin takes some getting used to as it's deep and designed to have the flexibility to do just about anything, but it's not nearly so difficult to get basically working as people think, and once set up, it works reliably and well - I use it all the time, with two parallel controllers, both old and unsupported by the companies that made them. 

Alexsey, I would like to know the syntax required in your plug in, for me to assign a button on my midi controller to run this sequence. I can see it would come in handy given my sausage fingered attempts at keyboard playing
:)

Yea even a little midi keyboard or tiny midi drum pad would work perfect for this application. I have several of these around, so I'll hook one up and see if I can get the proper midi messages for azslow3. Offering his help was quite a gracious offer! Thank you! (I'll also try the autohotkey program as well to see how difficult it is to get working properly)

ahk as mentioned by scook is very powerful and lightweight.  It's useful for all applications, not just Sonar.  IMO, it is well worth the investment in time to learn.

Another option is a programmable PC keyboard. That's what I've been using for a while. For example I've set up macros that let me jump to the next / previous marker - 1 measure so I pick up keyswitches, etc. It's easy and efficient (for me anyway). There are also secondary keypads available that do the same thing.

Hatstand
Alexsey, I would like to know the syntax required in your plug in, for me to assign a button on my midi controller to run this sequence. I can see it would come in handy given my sausage fingered attempts at keyboard playing
:)

http://www.azslow.com/index.php/topic,281.0.html

The explanation there can be usefully to read even for "HotKey"

Just curious (I might learn something here) as to why you hit CTRL-Z to undo the previous recording? Seems like if you set it to overwrite recording you can just hit space and r. 
 
At least that's what I do, but maybe I'm missing something. 
 
gabo