Brooks Cinema XS - 45 Frequency

Practically speaking, high frequency means high pitch and low frequency means low pitch.

Ambience
The portion of the sound that comes from the surrounding environment rather than directly from the sound source.

Brooks Cinema QS - 95 Echo Send Control
A control to send the signal from the input module to the echo chamber or effects device via the echo buss.

Atom
The smallest particle which makes up a specific substance. It's composed of a center around which electrons revolve.

Brooks Cinema ZL 44 Assistant Engineer
A less elevated version of the term Second Engineer. Experienced seconds often place microphones, operate tape machines, break down equipment at the session end and keep the paperwork for the session.

Analog To Digital Converter
The device which does the conversion of a quantity that has continuous changes (usually of voltage) into numbers that approximate those changes.

Echo
1) One distinct repeat of a sound because of the sound reflecting off a surface.
2) Loosely, used to mean reverberation (the continuing of a sound after the source stops emitting it, caused by many discrete echoes closely spaced in time).

Chase
The automatic adjusting of the speed of a recorder (or sequencer) to be time with another recorder.