With regard to accessibility on Mac, Pro Tools wins hands down. This is due to Avid working with Slau and choosing to fix Pro Tools and make it more accessible for Voiceover users on the Mac. Avid haven’t ask visually impaired customers for anything. They just chose to fix it as it’s the right thing to do. I don’t currently know of any other DAW manufacturer who has taken this approach.
I also fully appreciate that all developers work under tight time constraints and other priorities take over. Still Avid should be applauded for this. Avid treat accessibility as they would developing for any other language. Note: I do have pro Tools on the Mac but it’s not my primary DAW. Samplitude on Windows is and as we Know Samplitude Pro X3 Suite is around 96 97% based on Sequoia’s code base. Magix are also working with us to make Samplitude more accessible and we have scene some changes in Samplitude that really have made a difference.
The Reaper developers have also worked hard to make its UI accessible for screen reading software and I don’t think they have limitless funds either.
As for accessibility on Pro Tools not being as good as other options on Windows. That’s probably a debatable point as PT continues to improve in this area. Add to that Flo Tools:
And you have an extremely comprehensive solution.