<Tr> <Td> </Td> <Td> Specific time--compound time signatures The bottom number represents the note value of the subdivisions of the basic pulse of the music (in this case the 8 represents the quaver or eighth - note). The top number indicates how many of these subdivisions appear in each measure . Usually each beat is composed of three subdivisions . To derive the unit of the basic pulse in compound meters, double this value and add a dot, and divide the top number by 3 to determine how many of these pulses there are each measure . This example announces that each measure is the equivalent length of two dotted crotchets (dotted quarter - notes). You would pronounce this as "Six - Eight Time". </Td> </Tr> <Tr> <Td> </Td> <Td> Common time This symbol represents time . It derives from the broken circle that represented "imperfect" duple meter in fourteenth - century mensural time signatures . </Td> </Tr> <Tr> <Td> </Td> <Td> Alla breve or Cut time This symbol represents time, indicating two minim (or half - note) beats per measure . Here, a crotchet (or quarter note) would get half a beat . </Td> </Tr> <Tr> <Td> </Td> <Td> Metronome mark Written at the start of a score, and at any significant change of tempo, this symbol precisely defines the tempo of the music by assigning absolute durations to all note values within the score . In this particular example, the performer is told that 120 crotchets, or quarter notes, fit into one minute of time . Many publishers precede the marking with letters "M.M.", referring to Maelzel's Metronome . </Td> </Tr>

What does the musical note c sound like