<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  What is a time signature in music theory? Context: A time signature in music theory is a notational convention that specifies the number of beats in each measure and the value of one beat. Answer: [/INST]A time signature is a notational convention used in Western musical notation to specify how many beats are in each measure and which note value constitutes one beat.</s>