Brooks RM 909 reviews Keying Input (Key Input)

An input on a dynamics processing device to control the device by an external audio signal.

Lead
The musical instrument that plays the melody of the tune, including the vocal.

Brooks HI FI projectors Insert
1) A punch in of the all of the tracks being recorded in a recording session.
2) On Solid State Logic consoles, placing an outboard piece of gear in the channel by patching and activating a switch.

Kilo
A prefix meaning 1000.

Brooks Hi Fi reviews Close Micing
A technique of placing a microphone close to the sound source (within one foot) in order to pick up mainly the direct sound and to avoid picking up leakage or ambience.

Electromagnetic Field
Magnetic energy put out because of current travelling through a conductor.

ADSR
The letters A, D, S &R are the first letters of: Attack, Decay, Sustain and Release. These are the various elements of volume changes in the sounding of a keyboard instrument.

High Impedance
Impedance of 5000 or more ohms.