- U -

Unbalanced - A method of interconnecting recorders, amplifiers and other electronic gear using two-conductor cable.

Undo - A command in some computer software that reverses the last command entered.

Uni- - A prefix meaning One.

Unidirectional - A pick-up pattern which is more sensitive to sound arriving from one direction than from any other.

Unison - Several performers, instruments or sound sources that are sounding at the same time and with the same pitch.

Unity Gain - No increase or decrease in signal strength at the output of an amplifier or device compared to the signal strength at the input.

Update By Absolute - Solid State Logic name for re-writing the settings for an automated console control.

Upper Midrange - The frequencies between 2 kHz and 6 kHz.

Upper Toms - Another name for rack toms (small to medium-size drums usually 10 - 14 inch diameter, that are mounted to a rack over the foot drum in a drum kit).