86.102Apply it to “Mack the Knife”

The repeated-chorus design makes this ideal.

Do not think:

Chorus 1 preset A.

Chorus 2 preset B.

Instead:

Chorus 1 two-beat.

During final bars: two-beat bass starts filling quarter notes.

Without stopping: Chorus 2 has become walking.

During Chorus 2: RH responses gradually become blocks.

Interlude: one response motif takes over.

Interlude sequences upward and establishes the semitone modulation.

Final chorus: same motif now becomes section punches.

Tag: density collapses.

Coda: return to sparse two-beat/cabaret character from opening.

The entire performance grows organically.