In the simplified musical notation, 1=C means C major.

The parallel minor key of C major is a minor, and its notes are arranged like this: the first three notes are in major third intervals, which is the major scale, and the first three notes are in minor third intervals. For the minor scale.

The parallel relationship between C major and minor is a minor. The parallel relationship between D major and minor is b minor. The parallel relationship between G major and minor is e minor. This is a diagram of the relationship between major and minor. So we can probably distinguish one. The song's major and minor keys have been changed.

Extended information:

According to the system of twelve equal temperaments, you can start from any semitone (DO, #DO, RE, #RE, MI, FA, #FA, SOL, #SOL, LA, #LA, SI), create a new major key according to the order of the rhythmic intervals of the major key, taking C major as an example: I, II, III, IV, V, VI, VII, I. That is: whole tone, whole tone, half tone, whole tone, whole tone, whole tone, half tone.

Each major key has seven tones, and the Roman numerals are the series arranged for these seven tones. The first note is the I-level sound, which is often called the most important sound in the entire major key. is the "tonic tone", and the seventh tone is the VII tone. As the VII tone that guides the entire scale back to the tonic tone, it is often called the "leading tone".

Baidu Encyclopedia—C Major

Baidu Encyclopedia—C Major