Hi Bryan, Question: Am I correct in assuming that you need a 64-bit machine to take advantage of that engine? Also, I have another question that's kind of related to mixing, but it has more to do with rendering. When I use an external encoder to convert to MP3, Sonar will run the encoder software okay; however, the resulting conversion has the extension of .mp3.tmp. I can't for the life of me figure out why that's happening. Any thoughts as to what's up with that? The external encoder software I'm using is Switch Sound File Converter. I can play the files fine; the work-around that I'm using at the moment is to simply rename them after the fact. I have all of the switches set correctly as far as the encoder's concerned, and as far as I know, I have it laid out according to what Sonar requires in the command line field. Thanks; and keep up the great work. Mike