A melodeon is a type of free-reed musical instrument, similar to a small accordion. It typically features a keyboard and bellows, allowing the player to produce sound by pushing and pulling air through metal reeds. Melodeons are often used in folk music and traditional styles, particularly in European countries. The instrument is known for its distinctive sound and portability, making it popular among musicians who perform in various settings. Melodeons come in different sizes and configurations, with some featuring a single row of buttons while others have multiple rows, allowing for a wider range of notes and chords.