General karaoke machines have USB interfaces, but do not support the device that needs to be driven, so you need to transfer the song file on the phone to the U disk. Need equipment: mobile phone, USB disk, computer, karaoke machine, mobile phone data line steps: first, mobile phone to the computer, USB disk to the computer, mobile phone target file copy to the USB disk two, USB disk to the karaoke machine, from the karaoke machine Settings into the \"U disk plus song\" different brands of karaoke machine entry may be different, edit the song famous song star and other information to save the third, restart the karaoke machine to confirm