Listen to Sleeping Sweetly Soundwaves online. Sleeping Sweetly Soundwaves is an English language song and is sung by RelaxMyCat. Sleeping Sweetly Soundwaves, from the album Soothing Summer Sounds: 12 Hour, Relaxing Music for Cats Inc. Anti-Anxiety Music, Sleep Music and Relaxation Frequencies, was released in the year 2016. The duration of the song is 1:03:45. Download English songs online from JioSaavn.