A short film on the true role of rotation within fast and easy trills. Rotation is always relevant but it helps the most when we accurately understand what it can offer. By applying some basic geometry, we see why rotation can greatly assist at such a distance as an octave. However, I show that this simply cannot function in anything close to the same way, with a trill on two adjacent keys. It is impossible to support any claims that the fingers might serve merely to pass on rotational energy, in this context. Without a huge amplitude of rotation close to 45 degrees (clearly impossible at high speeds) rotation could not generate sufficient vertical movement to explain basic key movements.
Explanations featuring overblown exaggerations of the role of rotation can severely distort understanding and hold back progress. Such models can only work if the fingers still provide the overwhelming majority of the basic movement. In the event that they don't move enough, the task becomes literally impossible. Rotation is important for staying free, but it is NOT a direct method of putting the keys down at speed. Unfortunately, I made the mistake of believing rotation as a primary energy source, for a long time. It caused a sense of heaviness, sluggishness and excess effort. Just because rotation is indeed important, it doesn't mean that we have to assign impossible roles to it. I can't overstate how much easier it becomes, when you have an accurate model of how individual ingredients can best blend together.
#piano #pianotechnique #trills #rotation #tremolo
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