Spectral Processing

Question 1

Filter

Answer 1

type of equalizer that is designed to reduce the energy
at a certain frequency or in a certain frequency band; purely subtractive

Question 2

All-pass filter

Answer 2

electrical circuit with a uniform frequency response, but it has a phase shift that does not vary in a linear relationship with frequency

Question 3

Band-pass filter

Answer 3

a filter that allows a specific band of frequencies to pass through while blocking frequencies above and below that pass band

Question 4

Band-reject filter

Answer 4

a filter that blocks a specific band of frequencies while allowing frequencies above and below that band to pass through

Question 5

Band limit

Answer 5

limiting the range of frequencies allowed to pass in a system; dynamically controlling a band of frequencies by limiting it

Question 6

Bandwidth

Answer 6

a span of frequencies

Question 7

Bell filter

Answer 7

type of filter that allows the boost or attenuation of a specified set of frequencies around a center frequency

Question 8

British EQ

Answer 8

any equalizer circuit that is designed and built in a way that emulates EQs from mixers that came out of England in the 1950’s, 60’s and 70’s

Question 9

Broadband

Answer 9

encompassing or consisting of a wide band
of frequencies

Question 10

Crossover

Answer 10

device designed to divide audio information into smaller frequency ranges to comply with the requirements of different transducers in an audio reproduction system, accomplished by running audio through set of filters

Question 11

Crossover frequency

Answer 11

specific frequency at which a crossover divides the audio information into separate frequency ranges

Question 12

Multi-mode filter

Answer 12

a device with multiple types of filters, ex. low pass, high pass, band pass, etc.

Question 13

Pole

Answer 13

circuit used to build a filter; attenuation of 6dB/oct in one pole

Question 14

Slope

Answer 14

the steepness of a filter, measured in dB/octave

Question 15

Filter sweep

Answer 15

technique that relies on using manual control or modulation in order to sweep the cutoff frequency from low to high or high to low values, causing the sound to change in brightness and character over time

Question 16

Transition band

Answer 16

band of frequencies between the unaffected frequencies and those affected by the set gain in a shelving filter