Oboe inserts, also known as reeds, are small pieces of cane or synthetic material that are inserted into the oboe and vibrate to produce sound. They are an essential part of the instrument and come in a variety of shapes and sizes. The reeds are held in place by a ligature, which is a metal or plastic band that wraps around the reed and the oboe's mouthpiece. Oboe inserts are usually replaced every few months to ensure the best sound quality.