Today's early music specialists either ban the use of vibrato or restrict it drastically. This position suffers from three principal weaknesses: the failure to understand the nature of a well-produced vibrato in which the so-called impurities of pitch become inaudible above a certain threshold of speed, through a mysterious brain function (comparable to that involved in stereophonic sound or stereoscopic vision); a misinterpretation of sources; and an unawareness of extensive historical evidence for vibrato use through four centuries, culminating in Mozart's eulogy of a fine vibrato for voice and instruments.
"The Vibrato Controversy,"
Performance Practice Review:
1, Article 3.
Available at: http://scholarship.claremont.edu/ppr/vol4/iss1/3