Converts DTS 5.1 to Ac-3 5.1 when converting MKV to other formats. Fast conversion. Easy and simple.
Leaves digital artifacts in the form of occasional "ticks" in the audio when DTS 5.1 is converted to AC-3 5.1. This occurs in 448 kilobit as well as 640 kilobit regardless of video formats, and does it on both of my Macs. I've tried restricting the conversion to audio only, but had the same problem. If the ticks don't bother you, it's a nice piece of software.
I've been waiting to find this type of converter for a while, and if it didn't leave these "ticks", I would pay for it.