* Trumpet
* Clarinet
* Saxophone
* Piano
* Guitar
* Bass
* Drums
In early jazz, the trumpet and clarinet were often the lead instruments, with the saxophone becoming more prominent in the 1920s. The piano was a crucial part of jazz combo bands, providing accompaniment and chords. The guitar was also used for accompaniment, and the bass and drums provided rhythm.
As jazz evolved, other instruments were added to combo bands, such as the trombone, banjo, and vibraphone. The instrumentation of jazz combo bands also varied depending on the region and culture in which they were playing. For example, in New Orleans jazz, the clarinet and trumpet were often the lead instruments, while in swing jazz, the saxophone and trumpet were more prominent.
Today, jazz combo bands continue to use a variety of instruments, with the most common being the trumpet, saxophone, piano, guitar, bass, and drums. However, the instrumentation of any given jazz combo band may vary depending on the preferences of the musicians and the style of jazz they are playing.