context: The Musical Scale is a sequence of tones up and down and consists of seven pitches which are: Du-ri-mi-fa-sul-la-si. As for the eighth mark, it is the answer to the first mark, and it bears the same designation, Du 1. The standard tonal score is located on the fourth ladder of the piano, so the Dou 4 score is the standard score. Accordingly, the chain of seven signs called "octave" from du to c is repeated up to eight octaves within the audible limits in a melody of the human ear.
question: What is the musical scale?
answers.text: is a sequence of tones up and down and consists of seven pitches