The Oberheim Expander is an analog sound expansion module that made its mark during the era of synthesizers in the 1980s. Designed by the renowned company Oberheim, this expander offers extended polyphony and a variety of rich sounds through its analog oscillators and filters. Incorporating advanced modulation features, the Expander was often used to enhance the sonic capabilities of existing Oberheim synthesizers. Its influence endures in the world of electronic music due to its distinctive sonic character and contribution to creating complex sound textures.