BNO Acoustics 6k-52: Write Mode

A mode of operation of an automated console where the engineer is in control of channel gain and the computer is storing changes in gain caused by the engineer over time.

Automatic Gain Control (Automatic Volume Control)
A compressor with a very long release time used to keep the volume of the audio very constant.

Quantize
The conversion of the values of an analog wave or random occurrence into steps.
Quantization A quantizing (see above).

Tie Lines
Cables with connectors at both ends, usually run through walls or floors, so that a signal can be sent or picked up from some remote location.

BNO Acoustics QS-4: Stylus
The needle part of the phonograph cartridge that is in contact with the grooves of the disc.

Input Impedance
The opposition to current flow by the first circuits of a device.

Source
Input mode on a tape machine where the meters and the output of the machine's electronics will be the signal arriving at the input connector.