My current live setup has been working fine using Mainstage 2.1.3 so when I saw 2.2 appear through the app store the other day I thought it would improve things if anything and just installed it . However ever since the cpu usage is reading a lot higher even resulting in me having to adjust the latency settings to 256 / 512 from my normal current setting of 128. Just to double check things I backed up my system and completely wiped it doing a fresh lion install and logic / mainstage right up to mainstage 2.1.3 again and sure enough the cpu usage was back to a much lower figure with the latency setting at 128. So again I installed Mainstage 2.2 from the app store to double check and sure enough with exactly the same setup the cpu idled around 24% which is a lot higher than under 2.1.3. Hardware - Macbook Pro 13" - mid 2009 2.2GHz, 8GB Ram, 500GB HDD Help!