original question: what Musical instrument is in a Musical Contribution associated with [Bass]?
answer: bass pedals, acoustic guitar, backing vocals...
answer type: Musical instrument.
auxiliary information: A bass is a type of classical male singing voice and has the lowest vocal range of all voice types. According to The New Grove Dictionary of Opera, a bass is typically classified as having a vocal range extending from around the second E below middle C to the E above middle C. Its tessitura, or comfortable range, is normally defined by the outermost lines of the bass clef. The bass voice type is generally divided into the basso cantante, hoher bass, jugendlicher bass, basso buffo, Schwerer Spielbass, lyric bass, and dramatic basso profondo.
What is the name of the Musical instrument that is in a Musical Contribution associated with [Bass]?