Wiktionary
bass notes
n. (bass note English)
Usage examples of "bass notes".
Abruptly she changed to a dominant key and a martial air, lots of the bass notes in a sturdy thumpy-thump, but half-way through she tired of that mood, and found herself involved in the accompaniment to a favorite aria.
The Gringg passed the drawing back and forth, mumbling in rapid bass notes with such intensity that Todd felt his ears itching and Hrriss could not keep his tail still.
Malone used to fancy he heard terrible cracked bass notes from a hidden organ far underground when the church stood empty and unlighted, whilst all observers dreaded the shrieking and drumming which accompanied the visible services.
The bass notes booming through the ceiling wavered in the air like butterflies.