Based on responses in this thread from much earlier this year, the "better than x%" is live updated with total respondents. 30/32 for me at a normal volume with headphones and a relatively quiet room (>94%, 0.9sec). The 1/64th step was the "difficulty threshold" for me, but I found as I went through the test that I could tell better if I focused on the decay and not necessarily the sustained tone once it got close. I've been a percussionist by training and hobby since I was 8 or 9 and in a formal music group ever since except a year or two in grad school.