HattuKeisari wrote:
I have problems with doing fast DK DK DKs (KD KD KDs). Any tips to improve?
TL;DR Practice, first and foremost.
They are pretty difficult, both to read and play. Understanding why they are difficult might help you out. As far as reading goes, I and probably a lot of others first started to learn to read patterns by taking small chunks, usually by their 1/4 structure, such as ddd, dkd, ddk, etc.. When you get into stuff like dd dk kk kd, you want to read them in individual parts but because they are smaller, you have to read more parts in a smaller amount of time. If this is the case, then continuing to try to play these notes is a good way to strengthen your ability to read overall, as you will naturally get faster. Eventually you will want to train yourself to read them in larger parts - in my above example, dd dk kk kd, this kind of pattern is somewhat common and I learned to just read it as a whole. Alternatively, since these notes frequently come in pairs, you can read them as if they were a quad, turning dd dk kk kd into dddk kkkd.
As far as playing them, they're difficult like quads in that if you're getting accustomed to having one hand play "main" notes and your other hand play "off" notes, such as always doing dkd as left/right/left, then it throws you off because you don't end the pattern with your main hand. The result is you have to make your main hand pause for a short amount of time, which goes against its muscle memory that you've been developing. The solution for this is nothing more than to just improve your muscle memory, although learning how to fully alternate will both help you handle these notes as well as help in a lot of other ways. If you think too hard on it, they can be rhythmically confusing, too.
Expect to mess up on them for a long time - even for my rank it's really easy for me to lose track of them, though. They're probably the second-hardest type of pattern for me to actually read and play.