noun
bass part; bass line
Refers to the lowest part in a musical piece, such as a bass line in a choir or instrumental arrangement. Used in musical contexts.
合唱では、最低音部が全体の響きを支える。
In a choir, the bass part supports the overall sound.
この曲の最低音部はとてもシンプルだ。
The bass line of this piece is very simple.
Compound of 最低 (lowest) + 音部 (sound part). A straightforward technical term in music.