Pitch - the highness or lowness of a tone, as determined by the number of vibrations in the sound
Range - the gamut of pitches, from low to high, which a singer may perform
*Posture - the way in which somebody holds his or her body, especially when standing
*Diction - the clarity with which somebody pronounces words when speaking or singing
Unison - Singing or playing the same notes by all singers or players, either at exactly the same pitch or in a different octave.
Harmony - The sounding of two or more tones simultaneously; the vertical aspect of music.
A piacere –(Italian) At the pleasure or discretion of the performer, i.e., the performer need not follow the rhythm strictly
Maestoso – (Italian) Majestically.
*from Encarta® World English Dictionary[North American Edition] © & (P) 2009 Microsoft Corporation.All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
"a piacere" definition adapted from http://www.music.vt.edu/musicdictionary/texta/Apiacere.html and http://en.wikipedia.org/wiki/A_piacere#A
