I believe my version of Battery is 3.0.4, I'll have to double check that when I get home.

I believe my version of Battery is 3.0.4, I'll have to double check that when I get home.

 
If that's the case, the first thing I'd do is download/install the v3.1 Battery update.

I am having the exact same problem with Sonar X2a. MIDI playback randomly skips notes whether in staff view or piano roll view. I have no controller or external interface attached to this computer. The computer is powerful (32GB Ram). It happens regardless of which soft synth I use. Sometimes it happens and sometimes it doesn't, sometimes on different notes from one playback to the next. Any help would be appreciated.

I checked with tech support. Apparently, in my case, the solution was to change the buffers to 1000. All working well now.