a musical time signature are the two numbers over each other after the bass or treble clef sign on a piece of music. you can also get the letter 'c' which is equal to 4 over 4. the time signature represents how many beats there are in a bar.
How many "beats" (pulses) in the measure. For instance:
4/4 means 4 beats per measure and the quarter note gets one beat 6/8 means 6 beats per measure and the eighth note gets one beat 3/4 means 3...