Nah, this is already a common part of good practice techniques.  When I was 12, I learned Chopin&#x27;s Fantasie-Impromptu, a piece where you have to play four sequential notes in the right hand in the same beat length as playing three notes in the left, over and over again (they call this four-against-three), by doing the following:<p>1) Practicing right hand alone slowly
2) RH staccato (short punchy notes)
3) RH long-short long-short (so it &quot;swings&quot; kinda like jazz)
4) RH short-long short-long
5) RH short-short-short-long, and all other combinations
6) Same techniques as above, but with the LH, applied to a triple rather than a quad
7) Practicing both hands together, with RH steady but LH a syncopated &quot;wrong&quot; rhythm
8) Both hands together, LH steady but RH a syncopated &quot;wrong&quot; rhythm
9) Gradually speeding up the metronome until 7) and 8) &quot;met in the middle&quot; and it started sounding smooth<p>Later when I learned Beethoven&#x27;s Appossionata (first movement), there&#x27;s this section in left hand that is hard and fast, five notes per beat. Really hard if you&#x27;re not left-handed.  My teacher had me learn it by learning the mirror-image inverse in the right hand at the same time - so for instance if you&#x27;d play a C# in the left, you&#x27;d play an Eb (an octave up) in the right. It sounded like crap, but the end result was like it was my right hand &quot;teaching&quot; my left hand and I was eventually able to nail it.