BNO Acoustics BP-40: Notch Filter

A device that rejects signals that have frequencies within a narrow band of audio frequencies and passes all other signals.

RT
An abbreviation of Reverb Time (the time it takes for the reverberation or echoes of a sound source to decrease 60 dB, after the direct sound from the source stops).

Loop (Effects Loop)
A signal path separate from the main signal paths where a line signal is routed out of the mixer through a series of effects units, and then returned back to the mixer. The electronics within the mixer can then be used to individually control the effects on each input channel.

Preview Signal
A signal in disc recording that matches and is earlier than the signal being recorded.

Vertical Interval Code SMPTE
Time code that is recorded as part of the video signal (in the black area between picture frames) so that the time code numbers can be displayed on screen during editing.

BNO Acoustics YM-44: Reverberation Envelope
Literally the attack, decay, sustain and release of the reverberation volume; in other words, how fast the reverberation reaches peak level and its rate of decay.

Metronome
A device which makes a clicking noise in adjustable intervals. Used in guitar practice to improve timing.