The major second is not a consonant interval.
The major second is a term for "interval" in music theory. It belongs to the second interval. Its composition is a whole, a whole tone. It is a kind of dissonant interval. It is the middle of the major and minor sevenths. The second degree.
Dissonant intervals refer to intervals that sound uncomfortable and do not blend well with each other. For example, in the concept of music theory, the interval between C (Do) and D flat (Re) is 2 degrees smaller, which is called a dissonant interval.
Examples of major second degrees
In one octave (standard piano) there are do-re, re-mi, mi-#fa, fa-sol, sol-la, la -si,si-#do.
Consonant intervals and dissonant intervals are divided into comfortable and uncomfortable to people's ears. This is because the sounds that appear at the same time (that is, the harmonic intervals) are divided into consonants and dissonants. Consonant intervals are pleasant to people's ears, while dissonant intervals are unpleasant to people's ears. Intervals that sound pleasant to the ear are consonant intervals, and intervals that sound discordant and discordant are called dissonant intervals.
Consonance interval 1*** has three effects: 1. Extremely perfect consonance interval: pure first, pure octave; 2. Perfect consonance interval: pure fourth, pure fifth; 3. Incomplete consonance interval: Minor third, major third, minor sixth, major sixth.
A perfectly consonant interval sounds like one note, or almost the same note. Complete consonance intervals sound tolerant of each other and feel very comfortable. Incomplete consonance intervals sound a little jumpy. However, they are still tolerable, so they are also included in the consonance intervals.