I haven't been able to check the sound quality because I don't have a machine to play them. The cassette tapes are relatively clean. A set of Karaoke Best Tape 3075 and 3115. - Model: 3075 - Model: 3115 - Song List: Tantei Monogatari, Suteki na Yasashiku, Sailor Fuku to Kikanju, Anata Mae no Niji - Song List: Genki o Dashite, Triangle, Tsubuyaki no Onpu, Shiroi Uta Hodou Thank you for looking. These are old items, so please consider purchasing if you understand they are used.