Brooks Cinema TX 509 Echo Send Control

A control to send the signal from the input module to the echo chamber or effects device via the echo buss.

Fundamental
The tuned frequency and (almost always) the lowest frequency that is present in the sounding of a pitch by a musical instrument.

Brooks KM 77 Bar
A term meaning the same thing as the term Measure (the grouping of a number of beats in music, most-often four beats).

Foldback
A European term for the signal sent to the stage monitors in a live performance.

Brooks Cinema xm 808 Cascade
To set and interconnect two mixers so that the stereo mixing buss(es) of the first mixer feeds the stereo buss(es) of a second mixer.

Dry
Describes a sound coming from the PA with no effects on it.

Cut-Off Frequency (Turnover Frequency)
1) The highest or lowest frequency in the pass band of a filter.
2) The highest or lowest frequency passed by an audio device (the cut-off frequency is usually considered to be the first frequency to be 3 dB lower than a reference frequency in the middle of the bandwidth of the device)

High Impedance
Impedance of 5000 or more ohms.