Sigo is a recorder model series developed in collaboration between Kunath Instrumentenbau and Geri Bollinger, one of Europe's leading recorder makers. This tenor instrument has almost the same grip width as a soprano (descant) recorder. The angled headjoint and the thumb rest are integrated into the mold to make it particularly ergonomic. The body is made of RESONA, a material developed by Kunath Instrumentenbau from renewable raw materials. The headjoint is made from plant-based resins.
Jo Kunath says, "We at Kunath Instrumentenbau were completely electrified when Geri Bollinger presented his current project to us and suggested we work together. For those of you who may not know who Geri Bollinger is: Geri is a Swiss recorder developer and I believe he was already one of the leading minds in the world of recorder development. For example, he developed the great bass and the sub-bass of the Superio series for Küng, so it is certain that those who have not yet heard his name have most likely already heard and admired his instruments. Geri outlined his idea. It was immediately clear to me... this is more than ingenious. This is what the [beginner] recorder had been waiting for since its rebirth in the 1930s: a warm, deep sound.”
When the recorder was reintroduced in the 1930s, he says, the larger recorders that were popular centuries before were ignored in favor of an instrument that was easy to play. That means that the only recorder most people know about is the high-pitched soprano from their elementary school days. "A soprano recorder in the hand and mouth of a trained recorder player can sound wonderful, but not [always] as a learning instrument. After all, you don't just play around on the highest keys on the piano either... unfortunately there was no recorder that was as easy to grip as a soprano recorder and that also sounded as pleasant as a tenor recorder." This new recorder solves that squeaky problem by having a folded bore, where the instrument's internal air tube, or bore, is folded back on itself in a U-shape, allowing for a long-sounding length to fit within a manageable physical size; essentially, the long tube is doubled back to create a compact instrument.