The Right Tempo
"The right tempo is a very important matter for the student. First of all, he must be absolutely positive that his time is correct. There is nothing so barbarous in all piano-playing as a bad conception of time. Even the inexperienced and unmusical listener detects bad time. The student should consider this matter one of greatest importance and demand perfect time from himself. With some students this can only be cultivated after much painful effort. The metronome is of assistance, as is counting, but these are not enough. The pupil must create a sense of time, he must have a sort of internal metronome which he must feel throbbing within all the time.
"Always begin your practice slowly and gradually advance the tempo. The worst possible thing is to start practicing too fast. It invariably leads to bad results and to lengthy delays. The right tempo will come with time and you must have patience until you can develop it. In the matter of 'tempo rubato' passages, which always invite disaster upon the part of the student, the general idea is that the right hand must be out of time with the left. This is not always the case, as they sometimes play in unison. The word simply implies 'robbing the time,' but it is robbed after the same manner in which one 'robs Peter to pay Paul,' that is, a ritard in one part of the measure must be compensated for by an acceleration in another part of the measure. If the right hand is to play at variance with the left hand the latter remains as a kind of anchor upon which the tempo of the entire measure must depend. Chopin called the left hand the chef d'orchestre and a very good appellation this is. Take, for instance, his B flat minor Prelude. In the latter part of this wonderful composition the regular rhythmic repetition in octaves in the bass makes a rhythmic foundation which the most erratic and nervous right hand cannot shake.