Harmonica players can explore a variety of techniques to add depth and expression to their music. Bending notes allows players to alter the pitch of specific reeds, enabling bluesy and expressive sounds. Vibrato adds a gentle fluctuation to the notes, enhancing the emotional impact of the playing. Tongue blocking and lip pursing are essential techniques for controlling the airflow and achieving different sound effects. Overblowing allows players to access additional notes and expand the harmonica's range, offering even more musical possibilities.