A
trombone player performs a glissando by moving the slide without tonguing.
A piano player performs a gliss by dragging his or her fingers along the keys.
A harpist drags his or her fingers along the strings on a harp to glissando.
A
guitarist will pluck a note, and while the string is still
vibrating, he or she will slide their finger along the neck.
A string player glisses similarly to a guitarist, but instead of plucking they will play a note with their bow.
A brass player that isn't a trombonist or a woodwind player will simply play a chromatic scale between the two notes.
