Thanks to my new Mac Pro, rendering projects from Premiere is now faster than ever. My most common flavor is h.264 for vimeo. The odd thing is that rendering audio now takes longer than rendering video. I usually apply audio effects such as EQ, reverb, compression and limiting. A half-hour program now takes about 7 minutes to encode but over half the time is spent on processing audio. Activity Monitor shows little or no CPU usage. When it starts working on video, CPU and GPU roar to life. My audio hardware is a simple D/A box for monitoring and analog inputs, a Focusrite Scarlett. Does anyone have any thoughts on why rendering simple audio effects now seem to take the most time?