Relative major and minor the major and minor keys that share the same notes in that key.
Aeolian Mode A medieval mode whose scale pattern is that of playing A to A on the white keys of a piano. This scale is also called the natural minor scale.
Sotto Voce 'Under voice' in Italian means to speak under one's breath. In music, a dramatic lowering of the vocal or instrumental tone . not necessarily pianissimo, but with a hushed quality. An example of Sotto voce is in the Lacrimosa from Mozart's Requiem Mass in D Minor. The singers lower their volume in order to attain the 'hushed' quality desired.