They are often noted for their use of two-part harmonies while singing backing vocals for one another's songs.

Meleusippus and Eleusippus asked in perfect two-part harmony, spoiled only by the nicotine rasp of their voices.

Then she began a chant, and the drummers picked up the chorus in two-part harmony.

Their idols were the Everly Brothers, whom they imitated in their use of close two-part harmony.

The singers began to sway, and some broke into two-part harmony.

Technically, they incorporated bass machines, two-part harmony and live drum sets.

With the flip of a computer switch, her voice dives to the depths of a Russian basso or accompanies itself in two-part harmony.

In the "grounation" half, a guitarist gently played standard major chords, and the group members sang biblical language in two-part harmony.

Koko was yowling in two-part harmony and running back and forth between sitting room and porch.

Apart from this, of course, my marriage is all two-part harmony, but the organic debate is really the stuff of couples therapy.