One of the many difficulties caused occurs in transposition on the piano. When transposing from, say, C minor to F minor, the child must first think in E[b] major, so as to get the pivot of reference, then in A[b] major for the new pivot A[b]. Yet all the time its real sense of pivot, which, be it noted, has been admirably trained by the Sol-fa treatment of the major scale, is in favour of C and F respectively.
The method evolved for the minor key by those who wish to uphold the fundamental principle of the key-note being the pivot of reference for all keys, major and minor, is a very simple one. It consists in giving to the third and sixth of the harmonic form of the scale their logical names of maw and taw. The sixth of the ascending scale in the melodic form will of course be the same in the minor as in the major.
There are two other points in the orthodox Sol-fa system which are modified by those who wish to use it as a crutch to staff notation. The first of these concerns the rather complicated time notation of all but the first sets of exercises. Directly subdivisions of the beat are introduced the notation becomes difficult to read without putting a strain on the eyes. The little dots, dashes, commas, &c., worry children. Experience has proved that when a class is ready for anything beyond the very simplest time values it can leave the Sol-fa notation altogether, and keep entirely to the staff notation. This is, of course, an advantage, and is what is being aimed at.
The other point is connected with the use of what are called ‘bridge-notes’. When a modulation is introduced which entails a fairly long reference to a new key, the note leading directly to it is of course accidental in the first key and diatonic in the second. This is called a bridge-note, and must be thought of in two ways, first in the old key, then in the new. Thus its name must be changed, as a prelude to using the new pivot.