Only just spotted this thread, as we have been kinda very busy lately (hence the slowdown in activity lately)
Our authoring systems are a combination of tools, depending on exactly what we need to get done so here goes:
DVD-Video discs:
Sonic Scenarist SD, with the DTS MAS series encoder & the SurCode AC3 encoder (when used) on a Windows 7 64-bit system (Scenarist SD is a 32-bit application though)
DVD-Audio/Video discs:
Video_TS is done with either Scenarist SD or Media Chance Labs DVD-Lab Pro 2 (both on Windows 7 64-bit systems) depending on the content.
To explain.
Scenarist cannot create a slideshow with song markers that can be addressed. This is because it creates the separate images at the wrong level (VOBU instead of CELL) so whilst I can set up a timed slideshow to a high res stereo stream, you would not be able to access individual tracks. If I have to use a slideshow then I use DVD-Lab Pro, as this allows me to create an "Audio-Only" stream - essentially an I-Frame slideshow with addressable chapter marks but created at Cell level for the images. DVD-Lab Pro also allows you to turn off the abstraction layer at compile time, which is essential.
Both these tools have their problems, quirks & peculiarities though, such as DVD-Lab Pro is not happy using .cpt form of DTS. It will import it, but if you have to recompile it will not actually muultiplex the DTS stream - even though it is listed in the "success report" it is not actually there in the VTS multiplex. You have to relink it every compile yet if .dts is used (from the DTS-Pro series encoder) all is well. Go Figure!
All Audio_TS are done in Sonic DVD-Audio Creator version 3.0 (12) on an old XP/32 system as it simply does not work on anything later. I keep meaning to try and make it work in W7 but the problem is the way XML handling has been changed by MS, and it was the very nature of DAC using the XML files that made it so stable. You never work with the assets directly, but XML files instead. The downside is that you cannot simulate a build, and must compile & burn to test. MLP encoding is done with SurCode.