If the first note in a lower position is to be played with a finger that in the upper position is ultimately replaced by the finger following, the finger in question must slide from the upper position to its place in the lower. But ere it has reached it, the first note in this position must be gripped.
If the notes of the different positions are not bound together by means of legato signs, this sliding of the finger must take place so quickly that no notes are heard between. If the notes are bound together to be played in one bow, then the portamento or slide will be audible. The player must beware lest the portamento from one tone to another becomes exaggerated, or perhaps the entire enharmonic scale lying between the notes will be produced. All “whining” must be avoided, and the note next that to which the finger is sliding should not be heard.
The violinist must know the major and minor scales in all the positions, above all acquiring certainty in the various positions. On this account stress must be laid on the study of the same with the greatest possible diligence.
Double stops.
The violin is capable of producing a great variety of double notes or double stops. In conjunction with an open string, all the intervals may be given.
Unisons: