Question

The first section of this piece is referred to as a 'two-part organum.' What does that mean?

1) An organum is an early polyphonic work, and this example has two parts or melodies at the same time.
2) The music is all monophonic, but the section of the piece we heard has two separate parts.
3) The voices are accompanied by an organ, which creates two parts.
4) The texture is homophonic but has two parts to it.

Answer 1

A 'two-part organum' is an early polyphonic work with two simultaneous melodies, which was a significant development during the medieval period.

Step-by-step explanation:

In music, a 'two-part organum' refers to an early polyphonic work that consists of two parts or melodies being performed simultaneously. This was a significant development during the medieval period when most music was monophonic, meaning it had a single melodic line. Polyphonic music allowed for the blending of multiple melodies, creating a richer and more complex texture.