a toned down, smooth voice of a person of the opposite sex is generally considered "most pleasant" IT is dominated by men, so a girl is a practical choice if y

a toned down, smooth voice of a person of the opposite sex is generally considered "most pleasant" IT is dominated by men, so a girl is a practical choice if you want to be successful. That's actually not true. When you switch on the tube you will notice that most commercials (except those that are supposed to have women identify themselves with) are dominated by male voices. Being forced to use a female voice in an ad is usually considered a weakness because male voices are more effective in binding your attention and suggesting "trust". Regardless I don't think all of this plays much of a role in a tech screencast. I agree that I want to understand the damn thing, so get a pleasant speaker (of any gender) and don't make me suffer. From there my decision for or against a product will be influenced by so many details, I doubt "pleasant voice" affects it much.