The consideration of key ideas regarding the fundamental nature of music, or aspects of music, as well as of music within the broader philosophical study of the history of ideas. Some traditional concerns of the philosophy of music are - aesthetics; music and emotions; musical expression, meaning and understanding; performance and interpretation. Philosophical studies may also overlap with social or political studies of music. The philosophy of music is also concerned with ontological issues, or establishing what music is and what it is not. The study of electroacoustic music may draw upon traditional concerns of music philosophy, may highlight new areas of study (e.g. with the philosophy of technology), or may draw upon philosophical developments that were broadly synchronous with musical ones (e.g. phenomenology).