So, I've never used the auto-punch recording in Sonar very much, and I can't recall whether I've made this work in the past.
The Sonar help says:
"When punch recording, SONAR saves the entire recording while the transport is rolling, but the recorded clip is cropped to only expose the punch region. By also recording the pre-roll and post-roll, you have more flexibility later when it comes to slip-editing and cross-fading the clip because you have access to audio data before and after the punch region instead of only silence."
However. I can't get it to do this. If I record with an auto punch region set, I only get the exact punch region recorded. If I roll out the clip, there's no pre- or post-roll material there.
What am I doing wrong?