Licks 23a through 23d demonstrate the use of trilling techniques, using a variety of note combinations, respectively 4i and 5i, 5i and 6i, 4e and 5e, and 3i and 4i.
Of these note combinations, the 4i and 5i trill is the most commonly used in blues music. Each of these exercises begins by playing a slow trill that builds in speed, then a four beat trill with no tongue effects, then a four beat trill with a "da" staccato tongue effect.
Licks 23e and 23f demonstrate the use of a four beat trill that jumps to another note, followed by three silent beats. Exercise 23f uses both a continuous trill, and a trill with four staccato "da" tongue effects.
These licks combine to form a twelve bar blues solo which features trilling effects. For a last bar, the Lick 23a from Progressive Blues Harmonica is used, composed of a beat of 6e, 5i, 4i and a silent beat. In the first verse, no staccato effects are used, in the second, each trill has a series of "da" effects, sometimes two to the beat.