Hey mike. Sorry for the confusion. The original AAC problem was with videos encoded with handbrake. That problem has since been resolved. The newest issue is building 2 1080 HD movies with megui and mkvmerge. One played fine (didn’t transcode that one myself) and the one I built the sound wasn’t working. I read some additional posts on this forum regarding your suggestion about using an older version of mkvmerge. I’m going to give it a try later this week and post the outcome. Thanks for all your help thus far!