Cool. Well I'm a total so can't help you with high contrast. But can play with any of the audio stuff if you'd like. But also probably could find others with some vision to test those parts of the app.
Just message me a link or whatever works, and let me know if it's OK to share with others.
You could also join or post to the
$1It's a very busy group and it has its share of assholes but you could also get a lot of constructive feedback there as well.