Speed and Smoothness in Trilling
Will you kindly suggest a good method of gaining speed and smoothness in trilling?
While there are no "methods" for trilling there are certain means by which sluggish muscles may be assisted. Yet, even these means cannot be suggested without knowing the seat and cause of your trouble. The causes differ with the individual, but they are, in the majority of cases, purely mental, not manual. To trill quickly we must think quickly; for if we trill only with the fingers they will soon stick, lose their rhythmic succession, and finish in a cramped condition. Hence, there is no direct way to learn trilling; it will develop with your general mental-musical advancement. The main thing is, of course, always to listen to your own playing, actually and physically, to perceive every tone you play; for only then can you form an estimate as to how quickly you can "hear." And, of course, you do not expect to play anything more quickly than your own ear can follow.
Difference in Playing Trills
What is the difference in the manner of playing the trill in measure 25, and those in measures 37 and 38, of the Chopin Polonaise, Opus 53?
The significance of the trill in measure 25 is melodic, while that of the trills in measures 37 and 38 is purely rhythmic, somewhat in the nature of a snare-drum effect. The first trill requires greater stress on the melodic note, while in the other two you may throw your hand, so to speak, on both notes and roll the trill until it lands upon the next eighth-note.
The Meaning of Solfeggio
What is meant by "spelling" in music?
Unless it means the variety of ways in which most chords can be written it refers to an oral reciting of notes, properly called solfeggio.