"Singing undertone" refers to the background music added under the singer's singing during the recording process to enhance the atmosphere and emotional expression of the song and allow the listener to feel it better to the emotion the song itself is trying to convey. Pad sounds can embellish and enhance the music, and can also play a role in promoting the emotion of the song, making the song more popular.

In the modern era of song production, pad sounds have become an essential part. Because the pad sound can enhance the emotional expression of the song and make the song more popular. In modern times, some star singers especially like to let some well-known music producers do their pad sounds, so as to further improve the suitability and marketability of the songs, and make the songs more popular.

Pad sound is considered a tool to enhance the atmosphere of a song. It can not only enhance the emotional expression of the song, but also use it to attract the listener's attention and make the song more perfect. The improvement of pad sound technology is the key to our song production. Only with more precise and professional pad sound technology can we create better-sounding songs.