#musical notation

• Althorn — A brass wind musical instrument with valves, conical in shape, having a middle (alto) register; it is primarily used in brass bands and wind orchestras to provide harmony between deep and high-pitched instruments.
• Altissimo — A musical term borrowed from Italian that indicates the highest register of a musical instrument (especially the clarinet or saxophone) or the execution of notes in the highest possible octave, exceeding the standard range of the score.
• Alto — A deep female voice or a boy's voice pitched in a register between soprano and tenor (also called contralto); a musical part or score written for this range. It also designates musical instruments with a timbre corresponding to this range (e.g., alto saxophone, alto flute) or, as an adjective, describes such an acoustic register.
• Aretino — The surname of the famous Italian writer, poet, and satirist Pietro Aretino, a prominent figure of the Renaissance, renowned for his biting wit, erotic writings, and immense political influence over European courts, earned him the moniker 'The Scourge of Princes'. In a structural-eponymic sense, the term also refers to an incisive, dogma-free satirical style, or references the medieval composer Guido of Arezzo (Guido Aretinus), the inventor of the modern musical staff notation system.