Listen to Tranquil Lullaby online. Tranquil Lullaby is an Instrumental language song and is sung by RelaxMyCat, Cat Music Dreams and Cat Music Therapy. Tranquil Lullaby, from the album Ultimate Cat Music: Soft Instrumentals for Feline Sleep and Anxiety Issues, was released in the year 2020. The duration of the song is 2:59. Download Instrumental songs online from JioSaavn.