What should I do if the Yamaha piano has a low voice?

Turn up the volume If the volume is independent, just turn the volume switch. If you want to adjust the keyboard volume, you should adjust it in the function menu, press and hold the function key, and then press the yes key to select the volume to M. The volume can only be selected by the number keys, and the maximum volume can only be 127. Yamaha (Shan Ye Yamaha) brand was founded in Japanese Qianqiao on 1887. Yamaha's products range from keyboard instruments such as piano, electronic organ and synthesizer, wind instruments such as brass and woodwind, stringed instruments such as violin and cello, and all percussion instruments to the most advanced professional audio equipment.