2 part invention

1. What is a two-part invention Bach?
2. What is a two-part invention?
3. How do you write a two-part invention?

What is a two-part invention Bach?

The Inventions and Sinfonias, BWV 772–801, also known as the Two- and Three-Part Inventions, are a collection of thirty short keyboard compositions by Johann Sebastian Bach (1685–1750): 15 inventions, which are two-part contrapuntal pieces, and 15 sinfonias, which are three-part contrapuntal pieces.

What is a two-part invention?

In a two-part invention, the first voice plays the main theme while the other accompanies in free counterpoint. The voices then switch, with the second voice playing the main theme and the first providing counterpoint. Inventions can also have countersubjects that accompany the main subject of the piece.

How do you write a two-part invention?

Fun With Counterpoint: Crafting a Two-Part Invention

1. Compose a thematic motive. ...
2. Write an answer to that theme in the lower voice in the tonic key. ...
3. Compose a counterpoint above the answer in the first voice. ...
4. Continue on in the upper part with the theme, but this time it should be on the dominant.