1, 29 and 59hz are heavy bass, and the higher they are, the more shocking they are. 119 and 227hZ are bass, and the higher they are adjusted, the duller the sound will be. 474 is the mid-bass, 947 is the alto, and 1889 is also the alto. These three sections are mainly human voices.

2. 3770 is a mid-range and high-pitched sound, and the higher it is, the more transparent it is. 7523 is a treble, the higher it is adjusted, the shriller the sound will be. 1501 is also high-pitched, and the higher it is adjusted, the more delicate the sound will be. For heavy bass, adjust it according to the following ratio: from left to right (first of all, it is balanced): 9 9 6 5 4 0 0 4 5 8.

3. This is the bass effect picture of Dolby sound effect. You can try it. The effect is not bad.