Some are configured by the singer himself through music on the Internet, and some are automatically generated through some kind of software.

Harmony is generally created through the following points:

1. Chord progression

If you don’t understand what a chord is, what are the major thirds? Minor 35 chords, 7th chords, etc. I don’t know the constituent sounds of the chords. You can read them. Friends who understand can ignore them.

Take the key of C as an example

1: You can make a note, seven letters: C, D, E, F, G, A, B, and then write them below the letters. Go up 1, 2, 3, 4, 5, 6, 7. In the key of C, the first chord is C, the second chord is D, and the seventh chord is B. It is not difficult to remember.

2: Mark an m in the lower right corner of the 2nd, 3rd, 6th, and 7th degree chords, that is, D, E, A, and B chords, that is, the 2nd, 3rd, 6th, and 7th degree chords. It is a minor chord, so the seventh-level chords are C, Dm, Em, F, G, Am, Bm. As for why the second, third, sixth, and seventh-level chords are all minor chords, this involves the physical knowledge of three-dimensional relativity, so I It’s hard to explain clearly, just remember it. Remember, this method is applicable not only to the key of C, but to any key.

The next step involves the second point: chord direction.

Most popular songs are inseparable from some commonly used chord directions. As long as you know some chord directions, it will be much easier to pick up songs or arrange and write songs.

For example, the song "Do You Know I'm Waiting for You" is often learned by novices. The chords in the key of C are C, Am, F, and G. Let's look at the above series. The corresponding At a glance, it’s 1645. This is a very common direction. In fact, many popular songs follow this direction, such as "Long Time No See", "Xiaowei", "In Spring", etc. Therefore, knowing a common direction is equivalent to Learned many other songs.

The following is the key point. The reason why we remember 1645 instead of chords is because chords are only established in tonality, and using numbers, that is, chord progressions, to express the direction of chords is beyond tonality. For example, you said that the chords of the song "Do You Know I'm Waiting for You" are C, Am, F, G. This is strictly speaking wrong. It should be in the key of C, which is C, Am, F, G. If you change it to the key of D, it won't be the case. And if you want to say that the direction of the song "Do You Know I'm Waiting for You" is 1645, that's right. No matter what key it is in, it is 1645. If it is changed to the key of D, the chords of "Do You Know I'm Waiting for You" become D, Bm, Em, A.

The trends introduced above are basically applicable to most pop songs. When you want to add guitar accompaniment to a song, you can try these trends. You must use them if you are cool, haha . When you write a song, you can also play these trends and hum a melody. If you think it sounds good, and it doesn't repeat the existing ones, you can write it into your own song. Of course, these trends are only part of it, and there are also some special trends that I won’t go into here.

To sum up, when learning a song, in addition to memorizing the chords, you must first determine the key, then remember the chord progression, and think more about the direction of the chords. It is best to memorize them. Remember what the different chord levels are in each key, so that it will be very easy to change the key.