[bmah]

It's not exactly identical, but later on becomes the same patterns. If you're getting random goods, which I've did a lot, it likely means you're slightly falling behind/speeding up on a song that isn't exactly fast. For slow songs, emphasis on pretty much everything I hit helps with accuracy, although it tires me a bit more. Sometimes it's just how you hit those keys. Sharp short taps to boost accuracy. Keeping your fingers stuck on the keys will likely result in unintended goods from losing your feeling of "when to hit exactly".