Answer:
Are we answering all of this? If so, A key is the main group of pitches, or notes, that form the harmonic foundation of a piece of music. 2 beats per measure. 60-100 beats per minute. scale upon which a musical composition is based diatonic scale. time signature upon which a musical composition is built to specify how many beats (pulses) are contained in each measure (bar), and which note value is equivalent to a beat.
Explanation:
