Poor Sonar X3 Was Guilty until Proven Innocent

This evening, I spent a frustrating hour and a half and ended up with ringing ears and a headache. I heartily and profanely blamed Sonar. Here's what happened:
 
I wanted to add an acoustic guitar to my song in progress. I inserted an audio track, selected the input, plugged in my guitar, etc. Oh, that's not good! Lots and lots of interference, whistles, radios, screeches coming through the speakers and/or headphones. Tried and tried to stop it: moved possibly interfering wires, changed guitar cords, recorded anyway (it recorded all the interference). Began cursing Sonar with increasing intensity.
 
Eventually, light dawned (duh!): Needed to change the 9 volt battery in my guitar (a Taylor I love, but it has their older crummy Expression System, if I remember the correct term). I don't understand why it would go from just fine yesterday through such an obnoxious phase today. It would have been far preferable if it had just outright died; I'd have thought of the battery as the culprit much sooner. Instead, it just played some decent sound (I suppose, to give me false hope) interspersed with hundreds of bursts of horrible screeches and noise. OWWWW!
 
So there you go, and Sonar X3, I'm very sorry for all the horrible things I said to you today :(

Ya one thing that can be said about Sonar is that it likes to hold a grudge.

Better get the chocolates and roses.

That is so weird.  That exact same thing happened to me on Friday night.  I didn't mess around that much with sonar, but I did have to try 2 different 9 volt batteries before I found one that actually worked on my Taylor!

I was more panicking that something was wrong with the guitar than Sonar though!  Just After swapping out the first battery I was really getting worried!