Musicality (music) is "sensitivity to, knowledge of, or talent for music" or "the quality or state of being musical", and is used to refer to specific if vaguely defined qualities in pieces and/or genres of music, such as melodiousness and harmoniousness. These definitions are somewhat hampered by the difficulty of defining music, but, colloquially, "music" is often contrasted with noise and randomness. A person considered musical has the ability to perceive and reproduce differences in aspects of music including pitch, rhythm and harmony (see: ear training). Two types of musicality may be differentiated: to be able to perceive music (musical receptivity) and to be able to reproduce music as well as creating music (musical creativity).