1. Initial stage. Moderate volume, playing soothing music, lasting about 2 hours, playing for 3 hours at a time.
2. Intermediate stage. Turn up the volume and play various styles of music for about 3 hours, and play for 3 hours at a time.
3. Advanced stage. The volume is high, and intense music can be interspersed. After every 12-15 hours, stop and rest for 15 minutes to achieve better sound effects.
4. It should be noted that the time for cooking the machine should not exceed 72 hours, so as not to cause unnecessary loss to the speaker. At the same time, choose multi-band music as the sound source, such as symphony, adagio, metal music and classical rock, and you can also use white noise.