subbass

or sub-bass

[ suhb-beys ]
/ ˈsʌbˌbeɪs /

noun Music.

the pedal stop on an organ that produces the deepest or lowest tones; fundamental bass.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for subbass

subbass

subbase

/ (ˈsʌbˌbeɪs) /

noun

another name for bourdon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012