The Marlowe Sisters have sung together since childhood, and both describe their harmony arrangements as arrived at rather than written. Neither can reliably explain the process, which they concede is unhelpful when working with other musicians.
They have developed a rough method for collaboration: one sings the melody repeatedly while the other tries options aloud until something fits. It is inefficient, they admit, but attempts at a more systematic approach have consistently produced worse results.
Living apart for several years initially disrupted the shorthand, and rebuilding it took deliberate effort. They now schedule regular sessions with no goal beyond singing together, which both describe as maintenance rather than writing.
On the perennial question of sibling conflict, they are unromantic. Disagreements are frequent and usually brief, largely because neither is capable of sustaining a grudge past the next rehearsal.
