Demonstrating LilyPond support for figured bass

This snippet demonstrates how figured bass is supported in LilyPond. In addition to the numerous BassFigure objects available, you can always use text markups instead to get precisely what you need.
All of these examples are to be found in the relevant sections of the Notation Reference, where you will learn how to add a figured bass with simple but powerful notation.

\version "2.24"

<<
  \new Voice {
    \clef bass
    dis4 c d ais
    g fis e a
    r gis d b,
    f,! e c c
    c1
  }
  \figures {
    < 6 >4 < 7\+ >8 < 6+ [_!] >
    < 6 >4 <6 5 [3+] >
    < _ >4 < 6 5/>4
    <4- 6+ 7!> <5++> <3--> <7/> r <6\+ 5/> 
    < [4 6] 8 [_! 12] >
    < 5 \markup { \tiny \number 6 \super (1) } >
    \set useBassFigureExtenders = ##t
    <4 6> <3 6> <3 7>
  }
>>