Further Diminution Techniques in two Voice Texture
Part I - sequences
As a Baroque technique, the sequence plays a huge part in counterpoint. It is by definition one-voice imitation. Observe the soprano voice in this figure, notice that it has the ascending eighth note figure. This is known as a sequence.
Fig.1 Sequence
Notice that the first note of each group of eighth notes ascends by step. This is the simplest example of a sequence. further elaboration can be added, of course.
Part II - Figuration Preludes
There are instances of further diminution where one voice outlines the chords of the the other voices, either by arpeggios, or other techniques. the figure of: root - third - fifth - root is a good example of sequencing, because one voice will play root - third - fifth - root on each chord of the progression. Doing so is known as a Figuration Prelude.
Here is the Bach Prelude in C BWV 924. it demonstrates arpeggiation in the counterpointing voice.
