If fugue voices are in different keys how come they don't clash?

1. Can a fugue have 2 voices?
2. What is a real answer in a fugue?
3. What fugue has the most voices?
4. Is fugue vocal or instrumental?

Can a fugue have 2 voices?

In music, a fugue is a contrapuntal compositional technique in two or more voices, built on a subject (theme) that is introduced at the beginning in imitation (repetition at different pitches) and recurs frequently in the course of the composition.

What is a real answer in a fugue?

When the answer is an exact copy of the subject to the new key, with identical intervals to the first statement, it is classified as a real answer; if the intervals are altered to maintain the key it is a tonal answer.

What fugue has the most voices?

That 7-voiced Credo fugue in the BMM (BWV 232) is the biggest complete, strict Bach fugue I can think of at the moment (7 strictly fugal parts, equally melodic and sharing musical material all the way through...plus a free bass).

Is fugue vocal or instrumental?

A fugue is the most complex polyphonic musical form, involving imitation among the parts (called “voices” whether they are vocal or instrumental). The word fugue comes from fuga, meaning to chase since each voice “chases” the previous one.