Listen to 効率アップＢＧＭ online. 効率アップＢＧＭ is an Instrumental language song and is sung by 勉強ＢＧＭ集. 効率アップＢＧＭ, from the album 勉強のための3時間スムーズジャズ音楽：集中力高める音楽・捗るＢＧＭ, was released in the year 2021. The duration of the song is 4:05. Download Instrumental songs online from JioSaavn.