BNO Acoustics XR-90: Phase Addition

The energy of one waveform increasing the energy of another waveform because the two waveforms have similar phase relationships.

BNO Acoustics Speakers: Non-Directional
Used with microphones to mean the same thing as the term Omni-Directional (picking up from all directions).

Post
1) A position of a send control (or other control) after the main channel fader.
2) Short for the term Post-Production.

BNO Acoustics SQ-9: Precedence Effect
A factor in human hearing where delay has a much bigger effect on the human perception of the location of the sound source than level does.

BNO Acoustics QT-5: ST
An abbreviation used by an engineer for noting a Safety Take, indicating a take done after a take of acceptable quality had been recorded.

Instrument Out Direct
Feeding the output of an electric instrument (like an electric guitar) to the recording console or tape recorder without using a microphone.

Mixdown (Mix Down)
Combining the signals from the tracks of a multitrack tape onto a master tape; reverberation/other effects may be also added.