Listen to Mellow Trombone online. Mellow Trombone is an Instrumental language song and is sung by Slow Descent. Mellow Trombone, from the album 大人の夜を彩るゆったりジャズ - Music for the Night, was released in the year 2022. The duration of the song is 1:29. Download Instrumental songs online from JioSaavn.