Relates to filters and equalisers and is defined as frequency where the response has risen or fallen by 3dB. Sometimes  called the 'corner frequency' 

A filter that removes or attenuates frequencies in a defined range or bandwidth, while letting through those frequencies both above and below the band. A wider form of notch filter.

A filter which only removes a very narrow band of frequencies, or even a single frequency in extreme cases. A notch filter has an extremely high Q value (narrow bandwidth).

Small Diaphragm Capacitor microphone — a microphone with a diaphragm diameter of between about 10 and 15mm 

Large Diaphragm Capacitor microphone — a microphone with a diaphragm diameter of more than about 20mm

LU — Loudness Units. A measure of loudness normalisation relative to the target loudness. If the integrated loudness of a track measured -21LUFS, but the target loudness was -23LUFS, the meter would show a +2LU discrepancy.

See Word Length

See parametric equaliser

See parametric equaliser