There are more than 9,000 national karaoke songs and more than 9,000 international karaoke songs, WITHOUT a singer's VOICE. Some songs have Backing Vocals. We always try to use the best audio available on the market, so that the sound quality is as close as possible to the original music. However, we make it clear that karaoke songs are produced for DOMESTIC and/or AMATEUR use, they are not for PROFESSIONAL SINGERS.