@elettrona I'm sorry to contradict, I don't mean to do so bluntly, but products are not designed for the blind, or they very rarely are. The companies say they are designed for the blind, but they're actually designed for what a sighted designer thinks that sighted family and friends of blind people, or purchasers of products for governments, would find appealing. At best, they are designed for what one sighted designer finds appealing based on his own experience of a few blind people. There are, of course, exceptions, particularly in terms of software. Just for example, https://github.com/trypsynth/ and https://github.com/masonasons but these are exceptions. The rule is that you're appealing to your customer, and the customer isn't the blind guy, it's the person buying for the blind guy. That's what I see all the time, the vast majority of things have features I would never use, for example, and which I know nobody else who was blind would use, but which sound good when advertised to a sighted person because they sort of look like, to some extent, what sighted people do and how they interact with the world.