The voice is too low.

I suggest you try: 1, turn on the sound and audio equipment in the control panel, remove all mutes when playing, turn the volume to the highest, and then turn on the advanced option to turn the bass to the lowest and the treble to the highest. At the same time of this adjustment, turn on the speaker and listen to whether the sound is greater than 2 during the adjustment. At the same time, find the tape recorder from the beginning, turn on the effect, and increase the volume at the midpoint of the effect. 3. If all the above operations fail, check whether there is something wrong with the hardware of the control panel, or confirm whether the motherboard you are using has a sound card?