mm 

Used to describe tempo in terms of beats (often the meter signature
denominator) per minute, ala M.M. (Maezel's Metronome). Do not confuse this attribute with
midi.bpm or midi.mspb. In MIDI, a beat is always defined as a quarter note, *not the
numerator of the time signature or the metronomic indication*.

Attribute Information

Used By

Attribute Group mei:mei_att.mmtempo.attribute.mm

Source 

<xs:attribute name="mm" type="mei:mei_data.TEMPOVALUE">
  <xs:annotation>
    <xs:documentation>Used to describe tempo in terms of beats (often the meter signature denominator) per minute, ala M.M. (Maezel's Metronome). Do not confuse this attribute with midi.bpm or midi.mspb. In MIDI, a beat is always defined as a quarter note, *not the numerator of the time signature or the metronomic indication*.</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample