[ChuckS]

Since the audio buffer is effecting MIDI thru, there probably is still a delay at the 32 buffer setting, but it's so small it's playable for an accomplished keyboard person. Since keyboards are not my primary instruments I can tolerate up to a buffer of 128 for adding simple parts and fills as long as the MIDI is written to the session correctly (which it is). This should be logged as a bug by Avid - doesn't make sense for the audio buffer to effect MIDI thru.