Twinklecore, also known as "Noodle Rock", is a sub-genre of Indie Rock music, characterized by high-pitched, noodley guitar parts (most commonly played on multiple guitars) with largely instrumental Math Rock arrangements. The style emerged out of the mid-90's emo rock movement, but focussed more on odd time-signatures (with an often free-form jazz influence) and longer instrumental passages, whilst still maintaining the soft, melodic brand of rock that emo had become known for. Bands such as American Football, Sharks Keep Moving and The Appleseed Cast are considered pioneers of the twinklecore movement.