Never had any trouble converting a DTS-HD (from one of my bluray movie) to an AC3 file, or even taking a Dolby TrueHD to regular AC3. In fact, I've even been able to convert one track to .FLAC for MKV viewing on my PC. Never had any problem.
What what the problem you had exactly?
A low frequency flutter on one or more channels.
Guess it's a "your mileage may vary" scenario. I've also got Photoshop Elements 7 successfully installed and running, when both Microsoft and Adobe say it won't work.
Tried that. Still couldn't get it to work right. I'm very computer literate and tried everything I could think of. The only thing I think it may be is becasue I'm running a server OS as a workstation OS. Took a while to get everything set up and working correctly. But hey, it was time for a new OS install, I wanted Win7 and it was free to students so I jumped on it.