When a run of fast notes comes out lumpy — some notes rushed, some dragged — there's a simple practice-room trick that's been passed down for generations: stop playing it evenly and start playing it unevenly, on purpose.
Take the passage and play it in a long-short dotted rhythm: hold the first note of each pair longer, snap to the second. Then flip it to short-long: quick first note, long second. By deliberately pausing on alternating notes, you give your fingers time to prepare the next one, and any weak or sluggish finger suddenly becomes obvious.
Here's a quick routine:
Why it works: practicing in rhythms breaks an even run into a series of tiny "aim and rest" motions. Your hand learns each transition in isolation, and when you stitch them back together evenly, the weak links have been reinforced. It's one of the most reliable ways to clean up scales, arpeggios, and any sixteenth-note run.
Want a passage to try it on? Generate an exercise → at a level with sixteenth-note runs and rhythm-practice the trickiest bar.