👉 A quarterdeckish is a type of musical notation that uses four lines to represent a single measure. This notation is commonly used in jazz and blues music, where each line represents a note on a guitar or piano. The term "quarterdeckish" comes from the fact that it resembles the form of a quarter deck, which is a deck with four rows of cards facing outward. Each row has three cards facing inward, while the rest are face up. The notation uses this idea to create a
