All progressions must be diatonic, and parts should not cross.
The repetition of a note in a lower part should be avoided wherever possible. In a higher part, repetition to the extent of three notes in succession is allowed.
Do not use more than three thirds or sixths in succession. [[Fig. 8.]]
| Fig. 8. |
Successive similar skips, except the minor third (a), in one direction, are to be avoided. Successive skips of a fourth are good when the tones are the fifths of the triads on I, IV and vii°. The last tone should return one degree (b). [[Fig. 9.]]
Do not move more than an octave in one direction in two skips. [[Fig. 9c].]
| Fig. 9. |
Covered fifths and octaves, except from I to V, or V to I, are forbidden. [[Fig. 10.]]
| Fig. 10. |
Both parts skipping in contrary motion to a fifth or octave should be avoided in two-part writing. [[Fig. 11.]]