If the answer is an exact transposition of the subject (i.e. exactly the same but in the dominant key) it is called a real answer. Sometimes one or two notes have to be changed so that the music sounds right. This is called a tonal answer. For example: a subject that starts with a rising “doh – soh” (an interval of a fifth) will be answered by a rising “soh – doh” in the answer (an interval of a fourth).