The tromboon is a musical instrument made up of the reed and bocal of the bassoon attached to the body of a trombone in place of the trombone's leadpipe, combining the reed and the slide for a distinctive and unusual instrument.
The tromboon is a musical instrument. This musical instrument is made up of the reed and bocal of the bassoon. This bassoon is attached to the body of a trombone in place of the trombone's leadpipe for a distinctive and unusual instrument. The body of a trombone in place is combining the reed. The body of a trombone in place is combining the slide.